ABCB1 and obesity due to melanocortin 4 receptor deficiency: For the pharmacogenetic factors, after Bonferroni correction for multiple comparisons, no effect of the HTR2C –759C>T and ABCB1 1236C>T, 2677G>T/A, and 3435C>T polymorphisms on risperidone-induced overweight/obesity was observed.