“…When the effect of CBT on IAD was analyzed on the basis of geographical location, we observed that seven of these studies were carried out in China [23,25,45,76,77,78,79], two in Germany [70,33], two in Greece [62,63], three in USA [43,74], one in Korea [39], and one in Netherlands [65]. No work was retrieved from Australia, New Zealand, Africa or South America, possibly may be due to that different methods are being carried out in these regions for the treatment of IAD.…”