L Castro Alves1, M C Kendall2. 1. Department of Anesthesiology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, Rhode Island, EE. UU. 2. Department of Anesthesiology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, Rhode Island, EE. UU.. Electronic address: mark.kendall@lifespan.org.