“…From the 70 included studies, six fatigue scales were used in the herbal preparation for cancer fatigue of which 25 studies 6 , 14 , 16 , 18 , 20 , 26 , 29 , 32–34 , 37–40 , 44 , 46 , 50 , 51 , 54 , 55 , 57 , 64 , 65 , 71 , 72 used the piper fatigue scale (PFS) and 18 studies 6 , 14 , 16 , 18 , 20 , 26 , 29 , 32–34 , 37–40 , 44 , 46 , 50 , 51 , 54 , 55 , 57 , 64 , 65 , 71 , 72 took advantage of the PFS revised (PFS-R), 11 studies 4 , 9 , 13 , 17 , 23 , 31 , 42 , 45 , 49 , 61 , 73 using the cancer fatigue scale, and 8 studies 5 , 10 , 24 , 25 , 45 , 60 , 62 , 68 using the brief fatigue inventory, 3 studies 47 , 48 , 66 using the fatigue symptom inventory, and 2 studies ...…”