Ji Won Yoo (Medicine) with a team of physicians from the department of family medicine and neurology from Korea University recently published an article, "Association of High-Density Lipoprotein Cholesterol Variability and the Risk of Developing Parkinson Disease" in the prestigious journal Neurology. The paper explores the longitudinal association among high-density lipoprotein cholesterol (HDL-C) level, HDL-C variability, and the risk of developing Parkinson's Disease (PD).