“…For adipokines, adiponectin was measured in 12 studies, 41,42,49,[52][53][54][55][56]59,61,67,68 and leptin in 11. 42,49,53,55,56,58,60,61,64,68,73 Seventeen studies used plasma, 40,49,51,52,54,59-61,64-72 8 used serum, 41,42,53,55,57,58,62,73 and 3 used both of serum and plasma, 39,56,63 and one study did not report this aspect clearly. 50…”