1. Department of Biology, Grand View University, Des Moines, IA 50316, USA
2. Department of Kinesiology, Iowa State University, Ames, IA 50011, USA
3. Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011, USA
4. Department of Physical Therapy and Kinesiology, University of Massachusetts Lowell, Lowell, MA 01854, USA