1. Lilly Research Laboratories, Eli Lilly & Co.Lilly Corporate CenterIndianapolisIndiana46285USA
2. Department of Molecular and Experimental MedicineScripps Research InstituteLa JollaCalifornia92037USA
3. Department of Pediatrics and Howard Hughes Medical InstituteStanford University School of MedicineStanfordCalifornia94305‐5428USA
4. Division of Nutritional ToxicologyNational Center for Toxicological Research, Food and Drug AdministrationU.S. Department of Health and Human ServicesJeffersonArkansas72079‐9590USA
5. Departments of Biochemistry/Molecular Biology and Pharmacology/ToxicologyUniversity of Arkansas for Medical SciencesLittle RockArkansas72205USA