“…Across 44 studies, 689 participants were interviewed and 402 participated in focus groups. 31 studies conducted interviews, 16 , 24 , 25 , 31 , 32 , 34 , 36 , 37 , 38 , 40 , 41 , 42 , 43 , 44 , 45 , 48 , 49 , 50 , 51 , 53 , 55 , 57 , 59 , 60 , 61 , 62 , 63 , 64 nine conducted focus groups, 18 , 26 , 27 , 29 , 30 , 33 , 52 , 56 , 58 , 65 five conducted ethnographic studies with interviews, 17 , 46 , 47 , 54 , 66 and two conducted both interviews and focus groups. 35 , 47 The mean number of participants in interview studies was 20 (IQR 15–24), and in focus groups 40(IQR 15–37).…”