“…Three articles were further excluded being series of previously published data and two being case reports [44, 46, 47, 49, 57]. Thus, a total of 37 studies [2, 3, 5–14, 16, 20–23, 25, 30, 33, 36, 37, 39–42, 45, 48, 51–53, 55, 56, 59, 61–63] were finally included in the quantitative and qualitative analysis (a detailed study description is reported in Table 1). Seven of them were comparative studies: 2 randomized controlled trials and 5 prospective comparative studies.…”