1. São Paulo State University; Department of Surgery & Orthopedics; Distrito de Rubião Júnior, s/n São Paulo Brazil 18618-970
2. Botucatu Medical School, Universidade Estadual Paulista (UNESP); Department of Anaesthesiology; Distrito de Rubião Júnior, s/n Botucatu, São Paulo Brazil 18603-970
3. Marilia Medical School; Evidence Based Health Actions Department and Thoracic Surgery Department; Avenida Monte Carmelo, 800 Bairro Fragata Marilia Sao Paulo Brazil 17519-030