“…Of the total 17 included studies, four were conducted in Ethiopia[14, 17, 21, 22], five studies in the United States [3, 15, 19, 20, 25], two in Canada[9, 10], two in India[18, 23], Russia[24], Senegal[11], Uganda[26] and Brazil[13] each had one study. Six studies were conducted in low-income countries[11, 14, 17, 21, 22, 26], four studies in middle-income countries[13, 18, 23, 24] and seven studies in high-income countries[3, 9, 10, 15, 19, 20, 25].…”