“…Four hundred and sixty-three articles were identified for the qualitative systematic review. Sixty-two articles were eligible for the quantitative systematic review [3, 6, 8–67]. The rest of the articles were excluded, including: 97 articles that were not in English or French [68–164], one randomized clinical trial [165], one prospective study [166], seven case series [167–173], 174 case reports [2, 174–346], 10 basic science articles [5, 347–355], 26 articles that did not discuss UBC treatment [1, 356–380], 17 articles that did not represent clear data on healing [381–397], 18 review articles [4, 398–414], one article that was a reprint [415], three commentary articles [416–418], 36 articles with a sample size smaller than 15 [419–454], and ten articles with possibility of shared cohort [455–464] (Fig.…”