ITLN1 and obesity due to melanocortin 4 receptor deficiency: Fourth, missing data in some variables may have limited the scope of certain analyses; among the 13 participants without obesity, only 12 had serum leptin and adiponectin data, and 11 had serum omentin and visfatin data, while among the 14 participants with obesity, only 13 had available SBP and DBP data.