“…Only one study [28] had a one-month follow-up visit and the adherence rate was 62%. The adherence rate after three months was 67% (54-96%) based on ten studies [19,20,22,27,28,35,36,39,40,48], after six months 72% (45-89%) based on 15 studies [11,23-25,27,29,30,33,36-38,41,44,47,48] and 67% (27-92%) after twelve months based on 15 studies [11,23-27,29,30,33,34,37,41,44-46]. …”