“…The key characteristics of the 66 included studies [ 5 , 50 – 114 ] are detailed in Table 1 : Study Characteristics, Description of Strategies and Outcomes. Most studies used a retrospective cohort ( n = 35) [ 5 , 52 , 56 , 60 , 72 – 74 , 78 – 89 , 91 – 94 , 97 – 99 , 101 – 105 , 108 , 109 , 111 , 112 ], a randomized controlled trial (RCT) ( n = 24) [ 50 , 51 , 53 – 55 , 57 , 59 , 61 , 62 , 65 – 71 , 75 , 76 , 95 , 100 , 106 , 107 , 113 , 114 ] or a prospective cohort ( n = 7) [ 58 , 63 , 64 , 77 , 90 , 96 , 110 ] design. Almost all the studies were conducted in the U.S. ( n = 58) [ 5 , 50 – 57 , 59 – 61 , 63 , 67 – 74 , 77 – 99 , 101 – 114 ].…”