Abstract
Of the initial 1302 records screened in PubMed, 17 were assessed for eligibility by reviewing their full-text articles, which excluded 7 articles. Citation searching and snowballing yielded 5 more eligible articles, resulting in a total of 15 eligible articles included for analysis. Of these, 6 (40%) were explicitly global while the remainder were implicitly global. Study participants (n = 823) originated from 40 different countries, based on reported data or provided by correspondence. Of these, high-income countries contributed 748 participants (91%), followed by upper-middle-income countries with 59 participants (7%), lower-middle-income countries with 15 participants (12%), and one low-income country with 1 participant (<1%). Potential enablers of LMIC participation were using multiple participant recruitment and data collection methods, channels, platforms, and collecting data from participants using their native languages. Limited resources were identified as a potential barrier.