Received: 27 September 2019
Accepted: 6 August 2020
First Online: 15 August 2020
Ethics approval and consent to participate
: This study protocol was also registered in Iranian database of RCTs (IRCT;ExternalRef removed) with ID number of 31564. Besides, the Ethics Committee of Shahid Beheshti University of Medical Sciences was in charge of approving this study (No: IR.SBMU.MSP.REC.1396.899). A written informed consent was obtained; moreover, a physiatrist described the methodology, probable advantages and disadvantages of HA injections for every participant.
: Not Applicable.
: The authors declare that they have no financial or non-financial competing interests.