“…No study reported negative results. Of the nine studies that reported no differences detected, eight reported the use of a psychometric assessments that lacked sensitivity or reliability [6,16,18,26,28,45,49,57], seven of the studies over estimated the effects of the intervention including the expertise of the nurse conducting the intervention or the number of phone calls received [6,16,18,28,43,49,67], and six did not report justification of the sample size [6,16,18,28,43,49]. Another concern was the design of the studies, three studies performed post testing measures only [6,16,18].…”