F Norflus1, C J Tifft, Michael P. McDonald, G Goldstein, Jacqueline N. Crawley, A Hoffmann, Konrad Sandhoff, Kotaro Suzuki, Richard L. Proia
1Genetics and Biochemistry Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA