Figure 7C histogram shows the leptin difference between psoriasis patients and control was significantly greater in GG homozygotes (24.4 ± 1.1 ng/ml) than both GA heterozygotes (16.3 ± 1.3, P = 1.9 × 10−6) and AA homozygotes (12.0 ± 2.1 ng/ml, P < 10−7). The gene discussed is LEP; the disease is psoriasis.