“…Methodological quality varied with MERSQI scores ranging from 5.5 to 15.5 (mean score 10.1). The most common methodological limitations were studies being conducted at a single institution and utilising only cross-sectional or post-test-only methodologies [10, 12-19, 21-33, 36, 37], and a number of studies also had unclear response rates [13,15,16,19,22,24,28,30,31,34,36,37] (see Table 3…”