“…Of all, five 24,45,46,61,63 were multi-center studies and 29 20,21,23,24,27,[30][31][32][33]35,37,40,44,46,[47][48][49]51,55,59,61,62,64,67,68,[71][72][73][74] were observational-comparative studies. Fourteen studies 19,22,24,25,27,30,38,40,42,43,45,47,52 were European, 11 23,24,29,32,37,41,…”