1. From the Department of Anesthesia and Critical Care (S.S., J.N., V.P., J.D., A.T.)
2. Department of Obstetrics and Gynecology, Section of Maternal Fetal Medicine (H.R., A.M., R.N., S.C., S.R.)
3. Department of Medicine, Section of Cardiology (R.M.L., L.W.), University of Chicago, IL.