1 Universidade Federal do Maranhão, Santo Domingo Hospital, Teaching and Training Center, Scientific Department of the Brazilian Society of Anesthesiology - São Luís (MA), Brazil.
2 Scientific Department of the Brazilian Society of Anesthesiology, Scientific Department of the Latin American Confederation of Anesthesiology - Aracaju (SE), Brazil.
3 Universidade Federal Fluminense, Brazilian Society of Anesthesiology - Rio de Janeiro (RJ), Brazil.
4 Universidade Federal de São Paulo, Brazilian Society of Anesthesiology - São Paulo (SP), Brazil.