“…Among the 25 studies/series ( n = 10,958), the following were found: - eight from Asia ( n = 1851),
- three from India [21,22,23,46],
- two from Iran [24,25],
- one each from South Korea [43], Hong Kong [26] and Japan [27,47];
- two from the Eurasian trans-continent ( n = 460),
- Turkey [28,29,48];
- eleven from Europe ( n = 5899),
- one each from Belgium [32,49], Finland [33,50], Italy [34], Lithuania [44], Malta [35,51], the Netherlands [45,52], Spain [36] and the United Kingdom [37];
- two from Germany [30,31,53,54,55,56,57],
- two from Australia ( n = 715) [38,39,58,59];
- two from North America ( n = 841),
- one each from Canada [40,60] and the USA [41];
- one ( n = 1192) from South America,
- Brazil [42,61]; but
- none from Africa.
…”