1. From the Heller Institute of Medical Research, Sheba Medical Center, Ramat Gan (Y.E., R.Y.), Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv (Y.E.), Wingate College for Physical Education and Sport Sciences, Wingate Institute, Netanya (R.Y.), Faculty of Medicine, the Hebrew University, Jerusalem (R.Y.), and the Institute of Military Physiology, Israel Defense Forces Medical Corps (R.Y.) — all in Israel.