“…The histological subtype of COF was indeterminate in 37% of cases. Otherwise the distribution between the complex type and the simple type appeared to be almost equivalent with 34.1% of cases [8,15,21,23,26,[28][29][30][34][35][36][37]39,40,46,47,[50][51][52][53][54]56,57,60,61,63,65,[70][71][72][73][74]76,78,80,82,85] and 28.9% of cases respectively [6,7,[11][12][13][14]17,18,20,22,24,25,27,31,…”