Jeffrey Leiden, CEO of Vertex Pharmaceuticals, introduces Alex Gorsky, CEO of Johnson & Johnson, at the Boston College Chief Executives Club luncheon in Boston, Massachusetts September 11, 2015. REUTERS/Brian Snyder

Harriet Bowen, who had hip replacement surgery, walks down the steps of her trailer at the Treasure Beach trailer park in Selbyville, Delaware, June 27, 2012. Bowen, 64, from Salisbury, Maryland, received the Pinnacle all-metal hip in 2008. She soon developed pain, limited mobility and elevated levels of cobalt and chromium in her blood. In July 2011, Bowen's left hip fractured at the implant site, requiring more surgery. Picture taken June 27, 2012. To match Insight JOHNSONANDJOHNSON-IMPLANTS/ REUTERS/Tim Shaffer (UNITED STATES - Tags: HEALTH SOCIETY BUSINESS)

Harriet Bowen, who had hip replacement surgery, walks near her trailer at the Treasure Beach trailer park in Selbyville, Delaware, June 27, 2012. Bowen, 64, from Salisbury, Maryland, received the Pinnacle all-metal hip in 2008. She soon developed pain, limited mobility and elevated levels of cobalt and chromium in her blood. In July 2011, Bowen's left hip fractured at the implant site, requiring more surgery. Picture taken June 27, 2012. To match Insight JOHNSONANDJOHNSON-IMPLANTS/ REUTERS/Tim Shaffer (UNITED STATES - Tags: HEALTH SOCIETY BUSINESS)

Harriet Bowen, who had hip replacement surgery, sits in her trailer at the Treasure Beach trailer park in Selbyville, Delaware, June 27, 2012. Bowen, 64, from Salisbury, Maryland, received the Pinnacle all-metal hip in 2008. She soon developed pain, limited mobility and elevated levels of cobalt and chromium in her blood. In July 2011, Bowen's left hip fractured at the implant site, requiring more surgery. Picture taken June 27, 2012. To match Insight JOHNSONANDJOHNSON-IMPLANTS/ REUTERS/Tim Shaffer (UNITED STATES - Tags: HEALTH SOCIETY BUSINESS)

Harriet Bowen, who had hip replacement surgery, walks her puppy near her trailer at the Treasure Beach trailer park in Selbyville, Delaware, June 27, 2012. Bowen, 64, from Salisbury, Maryland, received the Pinnacle all-metal hip in 2008. She soon developed pain, limited mobility and elevated levels of cobalt and chromium in her blood. In July 2011, Bowen's left hip fractured at the implant site, requiring more surgery. Picture taken June 27, 2012. To match Insight JOHNSONANDJOHNSON-IMPLANTS/ REUTERS/Tim Shaffer (UNITED STATES - Tags: BUSINESS HEALTH SOCIETY)

Products made by Johnson & Johnson for sale on a store shelf in Westminster, Colorado April 14, 2009. Johnson & Johnson said its quarterly earnings fell, hurt by generic competition for its Risperdal schizophrenia drug and the strong dollar, but lower costs enabled the company to beat Wall Street expectations. REUTERS/Rick Wilking (UNITED STATES BUSINESS)

A first aid kit made by Johnson & Johnson for sale on a store shelf in Westminster, Colorado April 14, 2009. Johnson & Johnson said its quarterly earnings fell, hurt by generic competition for its Risperdal schizophrenia drug and the strong dollar, but lower costs enabled the company to beat Wall Street expectations. REUTERS/Rick Wilking (UNITED STATES BUSINESS)

Products made by Johnson & Johnson for sale on a store shelf in Westminster, Colorado April 14, 2009. Johnson & Johnson said its quarterly earnings fell, hurt by generic competition for its Risperdal schizophrenia drug and the strong dollar, but lower costs enabled the company to beat Wall Street expectations. REUTERS/Rick Wilking (UNITED STATES BUSINESS)

Products made by Johnson & Johnson are displayed for sale on a store shelf in Westminster, Colorado April 14, 2009. Johnson & Johnson said its quarterly earnings fell, hurt by generic competition for its Risperdal schizophrenia drug and the strong dollar, but lower costs enabled the company to beat Wall Street expectations. REUTERS/Rick Wilking (UNITED STATES BUSINESS)

Trading specialist Michael O'Connor of Bank of America works trading shares of Johnson & Johnson, on the floor of the New York Stock Exchange April 14, 2009. REUTERS/Chip East (UNITED STATES BUSINESS)