When Leptin Is Not There: A Review of What Nonsyndromic Monogenic Obesity Cases Tell Us and the Benefits of Exogenous Leptin. - Salum KCR; Rolando JM; Zembrzuski VM; Carneiro JRI; Mello CB; Maya-Monteiro CM; Bozza PT; Kohlrausch FB; da Fonseca ACP (Frontiers in endocrinology, 2021)