This protocol details the Parkinson’s Progression Markers Initiative Online Study (PPMI Online Study). Sponsor: The Michael J. Fox Foundation for Parkinson’s Research (MJFF) Principal Investigators: Caroline M Tanner, MD, PhD; Kenneth Marek, MD Date of Protocol: October 25, 2024 Protocol number: 026 Final Version: 1.0
Tanner et al. (Fri,) studied this question.