“…Of these, 5 were duplicates and were thus excluded and 31 were considered irrelevant based on a review of the title and abstract. The remaining studies were fully read, analysed and assessed for eligibility; 36 were then excluded due to unsatisfactory outcome [ 3 , 16 – 49 ], 5 due to unsuitable study design [ 50 – 54 ], 4 due to unsuitable patient population [ 11 , 55 – 57 ], 2 due to inadequate language [ 58 , 59 ] and 1 to unsatisfactory setting [ 60 ]. In the end, 1 study was included [ 61 ].…”