Dr. Frank Dumont knew one of his favorite patients was getting depressed. When Dumont first started seeing him, the man was in his 70s. He was active and fit; he enjoyed hiking into his 80s. But then things started to change. "He started complaining of his memory starting to slip," Dumont says. The man would forget where he had placed objects, and he'd struggle to remember simple words and phrases. Dumont prescribed antidepressants and saw him every eight weeks or so. "He was one of those people where you see them on the schedule for the day and you just smile," Dumont says. "You just realize you get a chance to chat with someone who feels like a friend."