Adipose tissue biopsy Subcutaneous abdominal adipose tissue (SAAT) biopsy was performed in every participant. Bergström needle was used to obtain samples of subcutaneous fat from paraumbilical area as already described [12]. Biopsy was performed at fasting conditions. About 300 mg of wet weight was obtained. The sample was immediately microdissected, weighed, divided for respective analyses and snap-frozen in liquid nitrogen and stored in -80oC until analyses.