NFL athletes seeking unproven stem cell treatments, research shows

Some National Football League players have been seeking out unproven stem cell therapies to help accelerate recoveries from injuries, according to a new paper. Each year, more than 700 stem cell clinics around the world open their doors to "stem cell tourists," according to the paper's authors. Patients travel abroad to seek treatment for ailments -- ranging from autism to multiple sclerosis and paralysis -- for which no cure exists and treatment options are limited. The use of stem cells as ort...