“…A total of 19 of 964 identified references satisfied the eligibility criteria of the present synthesis ( Figure 1 ). The 19 references reported 11 RCTs from Brazil ( n = 90), China ( n = 104), Denmark ( n = 100), England ( n = 71), the Netherlands ( n = 55), Sweden ( n = 66), Taiwan ( n = 68), and the United States ( n = 258) between 2001 and 2018 [ 8 , 9 , 15 , 16 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ].…”