Affiliation: | 1. Department of Oral & Maxillofacial Surgery (Head: Prof. Mohammad S. Khedr), Faculty of Dentistry, Tanta University, Egypt;2. Department of Chest, Faculty of Medicine, Tanta University, Egypt;1. Otolaryngology and Head and Neck Surgery Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil;2. Programa de Pós Graduação em Saúde da Criança e do Adolescente, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil;3. Programa de Pós Graduação em Epidemiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil;4. Pneumology Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil;5. Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil;6. Surgery Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil;7. Pediatric Pneumology Department, Hospital de Clínicas de Porto Alegre, Brazil;1. Penn State Hershey Medical Center Plastic Surgery, 500 University Drive, Mail Code HO71, Hershey, PA 17033, United States;2. Department of Plastic Surgery, Medical College of Wisconsin, Children''s Hospital of Wisconsin, 9000 W. Wisconsin Avenue, Milwaukee, WI 53225, United States;1. Department of Oral and Maxillofacial Surgery, VU University Medical Centre and Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, Netherlands;2. Department of Epidemiology and Biostatistics, EMGO+ Institute for Health and Care Research and Medical Library, VU University Medical Centre, Amsterdam, Netherlands;3. Department of Oral and Maxillofacial Surgery, Academic Medical Centre/Emma Children Hospital and Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, Netherlands;4. Division of Maxillofacial Surgery, Department of Surgery, General Hospital St-Jan Bruges, Bruges, Belgium |