Received: 21 March 2021
Accepted: 27 June 2021
First Online: 3 July 2021
: The current study was performed following the ethical standards in the Declaration of Helsinki. The institutional review board approved the ARIC and MESA study protocols of each participating center. All methods were carried out following relevant guidelines and regulations. Approval for undertaking the current project was also obtained from the School of Public Health & Neuroscience Research center, Shahid Beheshti University of Medical Sciences, Tehran, Iran (IR.SBMU.PHNS.REC.1398.090).
: All ARIC and MESA participants provided written informed consent.
: Not applicable.
: The authors have no relevant financial or non-financial interests to disclose.