Differential effects of cholesterol levels on cognition according to body mass index in Parkinson's disease.

"Declarations Ethics approval and consent to participateThis study was approved by the institutional review board of Yonsei University College of Medicine (No. 4–2014–0637). Informed consent was waived due to the nature of retrospective study. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. RS-2023-00209580) awarded to Seong Ho Jeong. Also, this work was supported by a grant from the Korea Health Technology R&D Project through the Korean Healthy Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number: HU21C0053) awarded to Phil Hyu Lee."