^aRehabilitation Research Center, Department of Physiotherapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran

^bDepartment of General Practice, Erasmus MC, University Medical Center, Rotterdam, The Netherlands

^cCenter for Muscle and Joint Health, University of Southern Denmark, Odense, Denmark

^dPsychosocial Health Research Institute, Iran University of Medical Sciences, Tehran, Iran

^eDepartment of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

^fSports Medicine Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran.

Address correspondence and reprint requests to Mohammad Ali Mansournia, MD, MPH, PhD, Department of Epidemiology and Biostatistics, School of Public Health, and Sports Medicine Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, P.O. Box: 14155-6446 Iran; E-mail: [email protected], [email protected]

The manuscript submitted does not contain information about medical device(s)/drug(s).

No funds were received in support of this work.

No relevant financial activities outside the submitted work.