Shalash A, Mohamed SR, Badr MY, Elgamal S, Elaidy SA, Elhamrawy EA, Abdel-Tawab H, Elshebawy H, Abdelraheem HS, Roushdy T, Bahnasy WS, Salem HH, El-Seidy EA, Shehata HS, Marouf H, Chaudhuri KR, Hamid E, on Behalf of the Egyptian Parkinson Research Group