Article 1 Female 1 Humans 1 Infant 1 Infant, Newborn 1 Length of Stay 1 Male 1 Micrognathism 1 Osteogenesis, Distraction 1 Pierre Robin Syndrome Pierre Robin syndrome 1 Retrospective Studies 1 Risk Factors 1 Tracheostomy 1 Treatment Failure 1 central nervous system malformation 1 cleft palate 1 death 1 distraction osteogenesis 1 female 1 follow up 1 heart disease 1 hospitalization 1 human 1 infant 1 laryngomalacia 1 length of stay 1 major clinical study 1 male 1 mandibular distraction osteogenesis 1