Bratlley Alexis Fernandez Hernandez is a physician and pediatric researcher at Fundación Santa Fe de Bogotá, with expertise in pediatric respiratory diseases and sleep medicine. His clinical and research work focuses on rare pediatric lung conditions, respiratory infections, and sleep disorders, with the goal of improving early recognition, diagnosis, and management in children. He has contributed to pediatric pulmonology through a peer-reviewed publication on Neuroendocrine Hyperplasia of Infancy (NEHI) in Pediatric Pulmonology. In addition to his scientific research, he is a contributing author to the textbook Pediatría: Diagnóstico y Tratamiento. His research projects include clinical characterization of NEHI, retrospective studies on Mycoplasma pneumoniae infections, validation of pediatric sleep questionnaires in Colombian populations, and investigations into the relationship between obstructive sleep apnea and enuresis in children living at high altitude.