Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), speaks at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), speaks at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), speaks at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), speaks at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), gestures as he speaks at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), speaks at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS HEADSHOT)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), wears sunglasses as he arrives to speak at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), adjusts his sunglasses as he arrives to speak at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS HEADSHOT TPX IMAGES OF THE DAY)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), speaks at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at the investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS HEADSHOT)

Bill Gross, co-founder and co-chief investment officer of Pacific Investment Management Company (PIMCO), speaks at the Morningstar Investment Conference in Chicago, Illinois, June 19, 2014. Gross, who runs the world's largest bond fund, took the stage at an investment conference wearing sunglasses and seeming self-conscious about his image, lacing his speech with references to American World War Two Gen. George Patton, hypnosis and troubled pop star Justin Bieber. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT HEADSHOT)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT)

Professional singer Alama Kante poses during a interview in Paris, June 16, 2014. Singer Kante, 31, from Guinea, underwent throat surgery under medical hypnosis, singing throughout the operation to ensure that doctors did not harm her vocal cords. The procedure in April to remove her thyroid gland, whose cells had become enlarged and thus a cancer risk, was unorthodox. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY HEALTH ENTERTAINMENT HEADSHOT)

A therapist hypnotizes students retaking the college entrance exams, during a meditation session at Deung Yong Moon Boarding School in Kwangju, some 40 km (25 miles) southeast of Seoul October 30, 2012. South Korea's exam hell is an annual event so full of pressure that many students are driven to despair, with some even taking their own lives. Some 140,000 of the test takers signed up for this year's entrance exam on November 8, 21 percent of the total, are high school graduates, according to government data. The really determined, or desperate, may decide to spend nine months at one of 40 private boarding schools like Deung Yong Moon ("Gateway to Success") to dedicate their waking hours for the test. Picture taken October 30, 2012. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: EDUCATION SOCIETY)

- PHOTO TAKEN 06FEB06 - Takeshi Kuroiwa (R), a Tokyo psychologist, talks to a patient before performing past-life regression, an exercise that uses hypnosis to try to help people remember lives they supposedly lived in the past in Tokyo February 2, 2006. More Japanese are turning to such psychotherapy due to a renewed interest in spiritualism sparked by a poplar television show. Picture taken February 2, 2006.

Takeshi Kuroiwa (R), a Tokyo psychologist, talks to a patient before performing past-life regression, an exercise that uses hypnosis to try to help people remember lives they supposedly lived in the past in Tokyo February 2, 2006. More Japanese are turning to such psychotherapy due to a renewed interest in spiritualism sparked by a poplar television show. Picture taken February 2, 2006. To match feature Japan-Spiritualism. REUTERS/Issei Kato

Visitors view an installation work by New York-based artist Lin Shumin called "Hypnosis Project" during the opening of the "Shanghai Biennale 2004" at Shanghai Art Museum September 28, 2004. After the first two editions were reserved exclusively for Chinese artists and traditional techniques (oil, ink, and watercolor painting), the Shanghai Biennale was opened to international participants. The Biennale aims to expand Shanghai's importance as the "gateway to the west" to the arts sector.

A visitor views an installation work by New York-based Taiwan artist Lin Shumin called "Hypnosis Project" during the opening of "Shanghai Biennale 2004" at the Shanghai Art Museum September 28, 2004. After the first two editions were reserved exclusively for Chinese artists and traditional techniques (oil, ink, and watercolor painting), the Shanghai Biennale was opened to international participants. The Biennale aims to expand Shanghai's importance as the "gateway to the west" to the arts sector. Some 120 artists and groups from Asia, South America, Africa, Europe and North America are participating in the two-month long exhibition. Picture taken September 28, 2004.

Visitors views an installation work by New York-based artist Lin Shumin called "Hypnosis Project" at Shanghai Biennale 2004. A visitor views an installation work by New York-based Taiwan artist Lin Shumin called "Hypnosis Project" during the opening of "Shanghai Biennale 2004" at the Shanghai Art Museum September 28, 2004. After the first two editions were reserved exclusively for Chinese artists and traditional techniques (oil, ink, and watercolor painting), the Shanghai Biennale was opened to international participants. The Biennale aims to expand Shanghai's importance as the "gateway to the west" to the arts sector. Some 120 artists and groups from Asia, South America, Africa, Europe and North America are participating in the two-month long exhibition. Picture taken September 28, 2004. REUTERS/Claro Cortes IV

Visitors view an installation work by New York-based artist Lin Shumin called "Hypnosis Project" at Shanghai Biennale 2004. Visitors view an installation work by New York-based artist Lin Shumin called "Hypnosis Project" during the opening of the "Shanghai Biennale 2004" at Shanghai Art Museum September 28, 2004. After the first two editions were reserved exclusively for Chinese artists and traditional techniques (oil, ink, and watercolor painting), the Shanghai Biennale was opened to international participants. The Biennale aims to expand Shanghai's importance as the "gateway to the west" to the arts sector. REUTERS/Claro Cortes IV