1. From the Department of Laboratory Medicine (T.W.K.), School of Medicine, University of California, San Francisco
2. Department of Physiology, College of Osteopathic Medicine, Michigan State University, East Lansing (S.E.D.)
3. Institute of Physiology of the Czech Academy of Sciences, Prague (M.P.)
4. Department of Cybernetics, Czech Technical University in Prague (F.J.)
5. Department of Pathophysiology, 1st Faculty of Medicine, Charles University, Prague (F.J., J.S., J.K.).
6. Department of Medicine (R.C.M.), School of Medicine, University of California, San Francisco