1. Institute of Endocrinology (H.Z., V.H., I.A.-H.), Prague 1, Czech Republic 116 94
2. Department of Human Metabolism and Nutrition (R.W.), Hebrew University, Jerusalem 911 20, Israel
3. Department of Pediatrics and Center for Research of Diabetes, Metabolism and Nutrition (I.A.-H.), Third Faculty of Medicine, Charles University, Prague 10, Czech Republic 100 34