@CNN: One concussion could increase the risk of developing Parkinson’s disease, according to new research in veterans https://t.co/GKAXPUPA3n https://t.co/SrMNaih0xz

@CNN: One concussion could increase the risk of developing Parkinson’s disease, according to new research in veterans https://t.co/GKAXPUPA3n https://t.co/SrMNaih0xz