1. Fish Endocrinology Laboratory (D.L., K.S.), Department of Zoology/Zoophysiology, Göteborg University, SE-405 30 Göteborg, Sweden;
2. Department of Nutrition and Food Sciences and the Biotechnology Center (D.L., I.N.), Utah State University, Logan, Utah 84322-8700;
3. Department of Pediatrics (L.A.), University of Bergen, Haukeland Hospital, N-5021 Bergen, Norway