“…Antibiotic access sources for children in six of the remaining studies were mainly leftovers of home-stored drugs from previous prescriptions or uses [38,60,63,[66][67][68] and private clinics in the other two studies [44,59]. Eighteen of the included studies were conducted in uppermiddle-income countries [24,25,38,39,48,49,52,58,[60][61][62][63][64][65][66][67][68][69], while the remaining twelve [21-23, 40, 44-47, 50, 51, 54, 57] and nine [20, 41-43, 53, 55, 56, 59, 70] studies were conducted in lower-middle-income and low-income countries, respectively. The children in 14 studies used non-prescribed antibiotics for acute diarrhea [20, 21, 23, 24, 39, 40, 43, 49-52, 54, 57, 70]; the children in nine studies used them for acute upper respiratory tract infections [25,41,42,55,[59][60][61][62][63]; and the children in the remaining 16 studies used them for mixed-types of childhood illnesses [22, 38, 44-48, 53, 56, 58, 64-69].…”