[1] GEORGE WASHINGTON UNIV,SCH MED & HLTH SCI,DEPT BIOCHEM,WASHINGTON,DC 20037
[2] GEORGE WASHINGTON UNIV,SCH MED & HLTH SCI,DEPT PHYSIOL,WASHINGTON,DC 20037
[3] PURDUE UNIV,DEPT FOOD & NUTR,W LAFAYETTE,IN 47907
[4] WISTAR INST ANAT & BIOL,PHILADELPHIA,PA 19104