1. School of Nutrition and Food Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
2. College of Applied Sciences, University of Illinois, Champaign, IL 61801, USA
3. Department of Mathematics and Statistics, Bowling Green State University, Bowling Green, OH 43403, USA
4. Department of Mathematics and Statistics, Georgia State University, Atlanta, GA 30303, USA
5. School of Nutrition and Food Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA