“…Most articles included in this review were primary studies ( n = 17), while others involved the review of existing literature and policies ( n = 1) and routinely collected data ( n = 1). Of the 19 articles included, 12 employed quantitative methods ( n = 12), 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 5 used qualitative approaches ( n = 5) 24 , 25 , 26 , 27 , 28 ; only one study ( n = 1) 29 employed mixed methods approaches while yet another study comprised a review of literature and policy documents collectively ( n = 1). 30 Most studies ( n = 6) were conducted in the United States of America, 12 , 13 , 17 , 22 , 26 , 28 while others were conducted in China ( n = 5), 14 , 15 , 16 , 21 , 23 Kenya ( n = 2), 18 , 24 South Africa ( n = 1), 20 Mozambique ( n = 1), 29 Nigeria ( n = 1), 25 Botswana ( n = 1) 27 and New Guinea ( n = 1).…”