“…Studies were published between 1993-2005 in the UK, [24][25][26][27] Australia, 18,20,22,28,29 United States, 21,30 Denmark, 31 Canada, 23 and New Zealand. 19 The methodological quality of these RCTs was assessed for performance, detection and attrition bias, and was graded 'A' (low risk of bias) to 'C' (high risk). 32 One study was graded 'A', 28 three were graded 'B', 25,27,30 and the remainder were graded 'C'.…”