Suspected link between ALS and head trauma suffered in football

San Francisco Chronicle—March 20, 2017

San Francisco Chronicle reports on former 49ers wide receiver Dwight Clark who announced that he has amyotrophic lateral sclerosis (ALS) and suspects football is the cause. 

They speak with Dale J. Lange, MD, neurologist-in-chief at HSS, who disputed any definitive cause-and-effect but added that "repeated head trauma absolutely puts you at increased risk of neurogenerative disease, including dementia and ALS."

Read the full article at SFChronicle.com.