LEP and obesity due to melanocortin 4 receptor deficiency: 26 Mărginean Mărginean CO CO Mărginean Mărginean C C Voidăzan Voidăzan S S Meliţ Meliţ L L Crauciuc Crauciuc A A Duicuet Duicuet C C Correlations between leptin gene polymorphisms 223 A/G, 1019 G/A, 492 G/C, 976 C/A, and anthropometrical and biochemical parameters in children with obesity.