“…A total of 32 clinical trial protocols met the selection criteria. Of these, 44% (14/32) [ [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] ]were informed by a pilot/feasibility study while the majority [56% (18/32)] [ [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] ] were not informed by a pilot/feasibility study ( Fig. 2 ).…”