NAMPT and obesity due to melanocortin 4 receptor deficiency: Forest plots indicated a positive correlation of serum visfatin and four obesity parameters (Figures S7–S12, TC: Fisher’s Z of 0.93, 95% CI: 0.00 to 1.86, p = 0.05; TG: Fisher’s Z of 1.20, 95% CI: 0.76 to 1.64, p < 0.00001; FBG: Fisher’s Z of 0.58, 95% CI: 0.22 to 0.94, p = 0.002; LDL-C: Fisher’s Z of 0.89, 95% CI: 0.72 to 1.06, p < 0.00001) and no apparent association in two others (HbA1c: Fisher’s Z of 0.15, 95% CI: −0.02 to 0.32, p = 0.09; HDL-C: Fisher’s Z of −0.50, 95% CI: −1.53 to 0.53, p = 0.34).