1. From the Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion (H.Z., X.L.)
2. Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha (K.K., K.P.P.)
3. Department of Pharmacology and Physiology, St. Louis University School of Medicine, MO (M.M.K.).