“…Thirty-three out of 39 studies reported that perceived adverse ARV reactions decreased adherence [12, 15–46], whilst six studies [47–52] described no apparent relationship. Nineteen studies [12, 15–27, 29, 32, 36, 44, 47] were conducted in high-income countries, eight [30, 31, 33, 34, 41, 42, 46, 49] in middle-income countries, and twelve [28, 35, 37–40, 43, 45, 48, 50–52] in low-income countries. (Countries—see Tables 1, 2).…”