Adipose tissue-based correlates of surgery-induced weight loss: Correlations in all subjects of adipocyte area (μM2) and preadipocyte (PA) frequency (% all SVF cells) with %TWL at 12 months in all subjects and in female and male subgroups; p-values shown are univariate (uv), age-adjusted (a), and age-, HbA1c-, operation-adjusted (a,h,o).