A CEA-Leti intracerebral optical device designed to slow down Parkinson's disease is displayed during the CES Unveiled press event at CES 2023, an annual consumer electronics trade show, in Las Vegas, Nevada, U.S. January 3, 2023. REUTERS/Steve Marcus 

Yves Auberson, who has Parkinson disease and recently walked 1122 kilometres through the Alps, poses in a pasture at La Dole in Cheserex near Geneva, Switzerland, July 19, 2021. Picture taken July 19, 2021. REUTERS/Denis Balibouse 

Yves Auberson, who has Parkinson disease and recently walked 1122 kilometres through the Alps, poses in a pasture at La Dole in Cheserex near Geneva, Switzerland, July 19, 2021. Picture taken July 19, 2021. REUTERS/Denis Balibouse 

Yves Auberson, who has Parkinson disease and recently walked 1122 kilometres through the Alps, poses in a pasture at La Dole in Cheserex near Geneva, Switzerland, July 19, 2021. Picture taken July 19, 2021. REUTERS/Denis Balibouse 

Yves Auberson, who has Parkinson disease and recently walked 1122 kilometres through the Alps, hikes in a pasture at La Dole in Cheserex near Geneva, Switzerland, July 19, 2021. Picture taken with a drone on July 19, 2021. REUTERS/Denis Balibouse 

Yves Auberson, who has Parkinson disease and recently walked 1122 kilometres through the Alps, hikes in a pasture at La Dole in Cheserex near Geneva, Switzerland, July 19, 2021. Picture taken with a drone on July 19, 2021. REUTERS/Denis Balibouse 

Yves Auberson, who has Parkinson disease and recently walked 1122 kilometres through the Alps, hikes in a pasture at La Dole in Cheserex near Geneva, Switzerland, July 19, 2021. Picture taken with a drone on July 19, 2021. REUTERS/Denis Balibouse 

A healthworker prepares to inoculate an elderly woman with Parkinson's disease with Sinovac's CoronaVac vaccine against the coronavirus disease (COVID-19) inside her home in Manila, Philippines, May 18, 2021. REUTERS/Eloisa Lopez 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, rests in her living room in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, chats with trainers before starting to practice boxing at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, poses during a boxing practice break in the ring at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, warms up before boxing practice at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, works on a painting at the balcony of her home in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas TPX IMAGES OF THE DAY 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, works on a painting at the balcony of her home in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices boxing with her trainer Muhammed Ali Kardas in the ring at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices boxing with her trainer Muhammed Ali Kardas in the ring at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, poses as she practices boxing at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, warms up on a treadmill before boxing practice at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices with a ball at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, arrives to practice boxing at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, walks to a club to practice boxing in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices boxing with her trainer Muhammed Ali Kardas in the ring at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices with a ball at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

A book about Parkinson's disease is seen at the table of Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, in her home in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices boxing with her trainer Muhammed Ali Kardas at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas TPX IMAGES OF THE DAY 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices boxing at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices boxing at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, practices boxing with her trainer Muhammed Ali Kardas at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, chats with her trainer Muhammed Ali Kardas as they take a break in the ring at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, drinks coffee and listens music before starting to practice boxing at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Trainer Muhammet Ali Kardas adjusts the gloves of Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, before they start to practice boxing at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

Nancy Van Der Stracten, 75-year-old suffering from Parkinson's disease, rests as she practices boxing in the ring at a boxing club in the southern resort city of Antalya, Turkey, February 26, 2021. Picture taken February 26, 2021. REUTERS/Umit Bektas 

A gyroscope is seen mounted on a GyroGlove, a wearable medical device designed to help people with Parkinson's disease and essential tremor stop their hands from shaking, near Towcester, Britain December 15, 2020. Picture taken December 15, 2020. REUTERS/Stuart McDill 

Business analyst Jenny Field wears a glove with a built-in spinning gyroscope that helps people with Parkinson's disease and essential tremor stop their hands from shaking, at her home near Towcester, Britain December 15, 2020. She is watched by GyroGear's Gordon McCabe. Picture taken December 15, 2020. REUTERS/Stuart McDill 

Business analyst Jenny Field wears a glove with a built-in spinning gyroscope that helps people with Parkinson's disease and essential tremor stop their hands from shaking, at her home near Towcester, Britain December 15, 2020. Picture taken December 15, 2020. REUTERS/Stuart McDill 

A gyroscope is seen mounted on a GyroGlove, a wearable medical device designed to help people with Parkinson's disease and essential tremor stop their hands from shaking, near Towcester, Britain December 15, 2020. Picture taken December 15, 2020. REUTERS/Stuart McDill 

Jeffrey Meckler, chief executive of Israel's Intec Pharma holds up their long-lasting pill to treat Parkinson's disease, during an interview with Reuters in Tel Aviv, Israel November 7, 2018. REUTERS/Steven Scheer 

Britain's Queen Elizabeth and Britain's Camilla, Duchess of Cornwall watch a demonstration of a dog of the charity Medical Detection Dogs sniffing out Parkinsons's disease during the 10th Anniversary celebration of the charity at The Royal Mews in London, June 6, 2018. Ben Stansall/Pool via Reuters 

Actor Michael J. Fox speaks during a panel discussion on Parkinson's disease during lunch at the annual Skybridge Alternatives Conference (SALT) in Las Vegas May 6, 2015. Fox was diagnosed with young-onset Parkinson's disease in 1991. REUTERS/Rick Wilking

Actor Michael J. Fox speaks during a panel discussion on Parkinson's disease during lunch at the annual Skybridge Alternatives Conference (SALT) in Las Vegas May 6, 2015. Fox was diagnosed with young-onset Parkinson's disease in 1991. REUTERS/Rick Wilking

Parkinson's disease patient Edson Salete, 78, drinks water with the help of her daughter Ana Carolina, 33, both residents of the region of Sao Paulo state that depends on the Cantareira water system, as the eighth-month rationing of water continues as a result of a record drought, in Itu October 27, 2014. The worst drought in 80 years has left the Cantareira system, that provides greater Sao Paulo with most of its water, with the lowest water level on record, with daily rationing becoming common in the region's smaller cities, according to the state authorities. REUTERS/Nacho Doce (BRAZIL - Tags: DISASTER ENVIRONMENT) 

French nun Sister Marie Simon-Pierre, whose recovery from severe Parkinson's disease which was the alleged miracle that set Pope John Paul II on the road to sainthood, attends a news conference in Aix-en-Provence April 16, 2014. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SOCIETY RELIGION) 

French nun Sister Marie Simon-Pierre, whose recovery from severe Parkinson's disease which was the alleged miracle that set Pope John Paul II on the road to sainthood, attends a news conference in Aix-en-Provence, April 16, 2014. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SOCIETY RELIGION) 

French nun Sister Marie Simon-Pierre, whose recovery from severe Parkinson's disease which was the alleged miracle that set Pope John Paul II on the road to sainthood, attends a news conference in Aix-en-Provence, April 16, 2014. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SOCIETY RELIGION) 

French nun Sister Marie Simon-Pierre, whose recovery from severe Parkinson's disease which was the alleged miracle that set Pope John Paul II on the road to sainthood, attends a news conference in Aix-en-Provence April 16, 2014. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SOCIETY RELIGION) 

French nun Sister Marie Simon-Pierre, whose recovery from severe Parkinson's disease which was the alleged miracle that set Pope John Paul II on the road to sainthood, arrives to attend a news conference in Aix-en-Provence, April 16, 2014. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SOCIETY RELIGION) 

French nun Sister Marie Simon-Pierre (R), whose recovery from severe Parkinson's disease which was the alleged miracle that set Pope John Paul II on the road to sainthood, arrives to attend a news conference in Aix-en-Provence April 16, 2014. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: SOCIETY RELIGION) 

British Prime Minister David Cameron (C) looks through a microscope at regenerating cells, part of a Parkinson's disease research project, while Israel's President Shimon Peres stands next to him, during their meeting in Jerusalem March 12, 2014. Cameron denounced Iran's government as a "despotic regime" in a speech to Israel's parliament on Wednesday and accused Tehran of making "despicable" efforts to arm Palestinian militants. REUTERS/Dan Balilty/Pool (JERUSALEM - Tags: POLITICS) 

Celebrating the end of their training session Parkinson's patients and trainers gather for a group cheer during their Rock Steady Boxing class in Costa Mesa, California October 4, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. REUTERS/Mike Blake (UNITED STATES) 

Parkinson's patient Jim Coppula heads home in his daughters vehicle after working out at his Rock Steady Boxing class in Costa Mesa, California September 25, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. REUTERS/Mike Blake (UNITED STATES) 

Parkinson's patient Jim Coppula gets some pointers from his daughter Ellen as he works out on a bag during his Rock Steady Boxing class in Costa Mesa, California September 18, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. REUTERS/Mike Blake (UNITED STATES) 

Parkinson's patient Jerry Held jumps over hoops as he works out during his Rock Steady Boxing session in Costa Mesa California, September 18, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. REUTERS/Mike Blake (UNITED STATES) 

Parkinson's patient Ron Addison walks back to rest in his corner after working out in the ring during his Rock Steady Boxing session in Costa Mesa, California September 16, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. REUTERS/Mike Blake (UNITED STATES) 

Parkinson's patient Jim Coppula gets some advice from trainer Anne Adams during his Rock Steady Boxing session in Costa Mesa, California September 16, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. REUTERS/Mike Blake (UNITED STATES) 

Parkinson's patient Ron Addison works out during his rock steady boxing class in Costa Mesa, California September 16, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. REUTERS/Mike Blake (UNITED STATES) 

Parkinson's patient Deloris Nouhan poses for a picture following her Rock Steady Boxing class in Costa Mesa, California October 4, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. Picture taken October 4, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: HEALTH SOCIETY PORTRAIT) 

Parkinson's patient Jennifer Parkinson poses for a picture following her Rock Steady Boxing class in Costa Mesa, California October 4, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. Picture taken October 4, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: HEALTH SOCIETY PORTRAIT) 

Parkinson's patient Ronnie Vaughn poses for a picture following his Rock Steady Boxing class in Costa Mesa, California October 4, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. Picture taken October 4, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: HEALTH SOCIETY PORTRAIT) 

Parkinson's patient Tony Pietrangelo poses for a picture following his Rock Steady Boxing class in Costa Mesa, California October 4, 2013. According to the Parkinson's Disease Foundation, research has shown that exercise can transiently increase the levels of dopamine in the brain, which is significantly reduced in Parkinson's disease. The club, whose headquarters is in Indianapolis, was started in 2006 and has 15 affiliates in six U.S. States, and one in Australia. Picture taken October 4, 2013. REUTERS/Mike Blake (UNITED STATES - Tags: HEALTH SOCIETY PORTRAIT)