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Kojiro Tokutake, a gastroenterologist at Nagano Prefectural Suzaka Hospital, right, discusses diagnostic test results with a patient at the hospital in Suzaka, Nagano Prefecture, Japan, on Friday, Nov. 8, 2013. Tokutake wanted to be a doctor since he was a teenager. His grandmother bought him his first stethoscope when he was in medical school. A decade later, he helped her die. Photographer: Ko Sasaki/Bloomberg via Getty Images

Kojiro Tokutake, a gastroenterologist at Nagano Prefectural Suzaka Hospital, right, discusses diagnostic test results with a patient at the hospital in Suzaka, Nagano Prefecture, Japan, on Friday, Nov. 8, 2013. Tokutake wanted to be a doctor since he was a teenager. His grandmother bought him his first stethoscope when he was in medical school. A decade later, he helped her die. Photographer: Ko Sasaki/Bloomberg via Getty Images