1. From the Department of Anesthesiology, University of Nebraska Medical Center, Omaha, Nebraska (S.J.E., M.C.N., J.A.S., K.R.P., J.H.T., S.J.L.); Veterans Affairs Nebraska Western-Iowa Healthcare System, and Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska (D.J.R.); Department of Surgery, University of Nebraska Medical Center, Omaha, Nebraska (D.W.M.); Departm