authors Chen, Honglei Zhang, Shumin M Michael Schwarzschild, MD, PhD Hernán, Miguel A Logroscino, Giancarlo Willett, Walter C Ascherio, Alberto
has subject area Adult Cohort Studies Diet Female Folic Acid Follow-Up Studies Homocysteine Humans Male Middle Aged Multivariate Analysis Parkinson Disease Prospective Studies Reference Values Risk Factors United States Vitamin B 12 Vitamin B 6