SLC6A20 and obesity due to melanocortin 4 receptor deficiency: In patients with a BMI ≥30, SNP rs17713054 SLC6A20-LZTFL1 (Figure 4L) was associated with an elevation in Tsp (p = 0.02), while among patients without obesity (BMI <30) rs61882275 ELF5 (p = 0.003) was found to increase Tsp (Figure 4M).