The electronic search identified a total of 1,476 records, of which 347 duplicates were removed. Of the 1,129 remaining articles, 81 were selected for full-text reading. After analyzing them and their reference lists, 16 studies [7,12,14,[24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36]] met our inclusion criteria. In addition, we identified seven guidance documents covering HTA criteria for rare diseases through a complementary search [37], [38], [39], [40], [41],