“…There were 8 studies [29,35,37,38,[40][41][42][43] with treatment periods of 3-6 months, which was the most common period used. There were 6 studies [27,28,33,36,39,45] with periods of treatment of 3 months or shorter, 3 studies with 24 months, 18, or 9 months each, respectively [31,32,44], and 2 studies [26,34] that did not mention the exact period (Fig. 4).…”