“…As shown in Tables 1 and 2, total 5 articles were included in the meta-analysis (quantitative synthesis) [5–9] and 22 articles were included in the systematic review (qualitative synthesis). Among the 27 articles for systematic review and meta-analysis, 4 articles were from Japan, [5,6,10,11] 4 articles from China, [7,9,12,13] 4 articles from Italy, [14–17] 4 articles from Netherlands, [18–21] 3 articles from USA, [22–24] 3 articles from Germany, [25–27] 2 articles from Israel, [28,29] 1 from Turkey, [8] 1 from Australia, [30] and 1 from Korea. [31] The earliest was reported in 1995 by Matsuzaki et al from Japan (Matsuzaki, 1995], and the latest, up to May 2016, was from China by Liu et al [13] and from Italy by Ambrogi et al [17] …”