Received: 27 November 2020
Accepted: 30 April 2021
First Online: 14 May 2021
: Ethics approval was obtained from the institutional review board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (UW 17-201). All subjects had informed consent for participation obtained.
: Written informed consent was obtained from all patients. A copy of the written consent is available for review by the Editor of this journal.
: There are no financial or non-financial competing interests. JPYC is a senior board member of BMC Musculoskeletal Disorders.