Fig. 1: PRISMA flow diagram of the included studies.

From a total of 748 studies retrieved from multiple databases during the initial literature search between the 15th and 25th of February 2023, we removed 439 studies due to duplication and many other reasons. We then screened 309 studies based on their titles and abstracts and excluded 167 studies for not reporting on any of the outcomes of interest. The remaining 142 studies were sought for retrieval and assessed for full-text eligibility, Subsequently, we removed: 5 review articles, 2 studies qualified by outcome measure but conducted before 2022 (on the basis of peer review process recommendation), and 96 studies for not reporting on any of the outcomes of interest and not meeting our other inclusion criteria. Therefore, a total of 39 studies having 40 reports were included in our initial search. At the request of the editorial and peer review process, we extended our literature search to studies published by 25th November 2023, repeated the search in the select databases, manual search and employed forward and backward citation tracking, generating 1783 studies. From this (1783), we excluded 1658 studies for duplication and other eligibility reasons and sought the remaining 125 for retrieval. From this (125), we excluded: 2 studies for being preprints, 9 studies for being reviews, 39 studies for being the initially included studies, and 74 studies for not meeting the inclusion criteria thereby making the remaining 22 studies from the update to qualify for inclusion. Therefore, a total of 61 studies (39 from initial and 22 from final literature searches, respectively) were finally included. We only included studies if they: (1) are original full-text publications; (2) are not reporting a conditional acceptance; (3) reported any of our outcomes of interest (acceptance, intention, uptake, and/or associated factors), (4) did not solely use a continuous variable to measure the outcome of interest; (5) were not clinical trials only; (6) were not conducted before 2022. From: Page MJ, McKenzie JE, Bossuyt PM, Boutron I, Hoffmann TC, Mulrow CD, et al. The PRISMA 2020 statement: an updated guideline for reporting systematic reviews. BMJ 2021;372:n71. doi: 10.1136/bmj.n71.