“…In four studies, no specific disease population was described [ 32 , 37 , 41 , 58 ]. In 21 studies, solely patients were involved [ 27 , 29 , 30 , 34 , 35 , 39 , 40 , 44 , 45 , 47 , 48 , 51 , 52 , 55 – 57 , 61 – 65 ], six studies involved public [ 32 , 36 , 38 , 42 , 46 , 58 ], 19 studies involved a combination of patients and public [ 15 , 24 – 26 , 28 , 31 , 41 , 43 , 49 , 50 , 53 , 54 , 59 , 60 , 66 – 70 ] and ten studies did not report whether they used patients, public or both [ 2 , 33 , 37 , 71 – 77 ].…”