Kirel, B., Doğruel, N., Akgün, N., Kiliç, F. S., Tekin, N., & Uçar, B. (1999). Serum leptin levels during childhood and adolescence: relationship with age, sex, adiposity and puberty. The Turkish Journal of Pediatrics, 41(4), 447-455. https://turkjpediatr.org/article/view/3259