“…The Euro-Qol-EQ-5D-3L questionnaire was used by four studies, 28,30,36,37 and one study 33 used the Child Health Utility 9D (CHU-9D) questionnaire with utility values based on proxy population weights. One study 35 converted patients' SF-36 scores to QALYs using the SF-6D excel scoring programme (Table S2). The two studies 31,32 Of the 23 studies, perspectives included societal measures, [21][22][23][24]33,35,37 the healthcare systems, [28][29][30]32,36,41 and patient or thirdparty payer, [25][26][27]30,35,40 whereas 6 studies did not explicitly state the perspective used in their analysis 15,31,34,38,39,42 (Table 1).…”