@CNN: One concussion could increase the risk of developing Parkinson’s disease, according to new research in veterans https://t.co/qHPtpsMBcX https://t.co/0gHmwISxtz

@CNN: One concussion could increase the risk of developing Parkinson’s disease, according to new research in veterans https://t.co/qHPtpsMBcX https://t.co/0gHmwISxtz