1. University of Minnesota, Department of Food Science and Nutrition, St. Paul, Minnesota, 55108, USA Tex.: , Fax.: ,
2. University of North Carolina, Department of Nutrition, Chapel Hill,, North Carolina, 27599, USA Tex.: , Fax.: ,
3. University of North Carolina, Department of Nutrition, CB# 7461, Chapel Hill, NC 27599–7461, USA Tex.: , Fax.: ,