“…Both limbs had the same condition (e.g., monitoring muscle mass in patients with hip osteoarthritis) in nine studies, and limbs had various conditions after unilateral procedures (e.g., monitoring muscle mass after fracture repair or TPLO of one side) in the other 40 studies. Those 40 studies used several different methods of data collection, which included presentation of absolute differences (cm, mm) [ 6 , 8 , 11 , 18 , 22 , 27 , 30 , 31 , 34 , 38 , 40 , 41 , 46 , 47 , 55 ] and percentage differences [ 4 , 7 , 20 , 21 , 23 , 53 ] between affected limb and unaffected contralateral limb, absolute differences (cm, mm) [ 5 , 9 , 56 ] and percentage differences [ 10 , 19 , 25 , 35 , 45 , 48 , 54 ] between pre-treated and post-treated same single limb, absolute circumference values (cm, mm) of bilateral limbs [ 39 , 43 ], and normalized limb circumference data by dividing it by the body weight in kilograms [ 24 ]. The remaining studies [ 12 , 26 , 28 , 29 , 42 , 63 ] did not clearly state how the comparisons between limbs were made.…”