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Chimp Attack-Face Transplant
FILE - In this Feb. 20, 2015 file photo, Charla Nash smiles as her care worker washes her face at her apartment in Boston. The Connecticut woman who underwent a face transplant five years ago after being attacked by a chimpanzee is back in a Boston hospital after doctors discovered her body is rejecting the transplant. Nash says doctors have decided to end an experimental drug treatment and put her back on her original medication in the hopes of reversing the rejection. (AP Photo/Charles Krupa, File)
Robotic Surgery
This photo provided by Axel Krieger/Science Translational Medicine shows Dr. Azad Shademan and Ryan Decker during supervised autonomous in-vivo bowel anastomosis performed by the Smart Tissue Autonomous Robot (STAR). Scientists have created a robot that stitched up tissue in living animals without a real doctor pulling the strings. Today many hospitals offer robot-assisted surgery, where surgeons control the machines by hand. But much like engineers are designing self-driving cars, the hope is to create autonomous surgical robots that could perform certain jobs all by themselves, freeing surgeons for more complex tasks. (Axel Krieger/Science Translational Medicine via AP)
Painkiller Safety FDA
FILE - This Feb. 19, 2013, file photo, shows OxyContin pills arranged for a photo at a pharmacy in Montpelier, Vt. Food and Drug Administration advisers are discussing changes to government programs that were intended to improve the safety of painkillers like OxyContin, but which have had an unclear impact. (AP Photo/Toby Talbot, File)
Chimp Attack-Face Transplant
FILE - In this Feb. 20, 2015 file photo, Charla Nash smiles as her care worker washes her face at her apartment in Boston. The Connecticut woman who underwent a face transplant five years ago after being attacked by a chimpanzee is back in a Boston hospital after doctors discovered her body is rejecting the transplant. Nash says doctors have decided to end an experimental drug treatment and put her back on her original medication in the hopes of reversing the rejection. (AP Photo/Charles Krupa, File)
Prince
Attorney William Mauzy answers questions from the media as he arrives at his Minneapolis office Wednesday, May 4, 2016. A published report says Prince's representatives arranged for the musician to meet a California doctor to help him kick an addiction to painkillers shortly before his death. Mauzy represents California Dr. Howard Kornfeld who couldn't immediately meet Prince so he sent his son Andrew to discuss treatment. The pop rock singer died on April 21 at the age of 57. (AP Photo/ Jeff Baenen)