“…The results for conduct, based on each category are as follows: of the seven studies in category 1, the conduct of four studies was rated ‘strong’, 35,36,41,47 one study ‘moderate’, 44 and two studies were ‘weak’ 45,46 . In category 2, of the five studies, the conduct of two studies was ‘strong’, 40,48 two studies ‘medium’, 37,39 and one study ‘weak’ 38 …”