“…The items included are from every inhabited continent except Central America. Thirteen studies were from Africa, 13,17,19,20,22,23,[36][37][38][39][40][41][42] 17 from Asia, 32,33,[43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] 17 from Europe 2,7,11,12,14,15,24,27,28,34,35,[58][59][60][61][62][63] , 14 from North America, 4,10,16,18,25,…”