1 Anesthesiology Department, Central Hospital of Funchal, Av. Luís de Camões 6180, 9000-177 Funchal, Portugal. Electronic address: mauro.carvalho.mendonca@gmail.com.
2 Anesthesiology Department, Central Hospital of Funchal, Av. Luís de Camões 6180, 9000-177 Funchal, Portugal.