[1] Univ Florida, Gainesville, FL 32611 USA
[2] Kansas State Univ, Manhattan, KS USA
[3] USDA, ARS, BARC, Beltsville, MD USA
[4] Iowa State Univ, Iowa City, IA USA
[5] Univ Kentucky, Lexington, KY 40506 USA
[6] Penn State Univ, University Pk, PA 16802 USA
[7] Univ Nebraska, Omaha, NE USA
[8] Texas A&M Univ, College Stn, TX USA
[9] Cornell Univ, Ithaca, NY 14853 USA
[10] Univ Illinois, Chicago, IL 60680 USA
[11] Virginia Tech Univ, Blacksburg, VA USA
[12] Univ Wisconsin, Madison, WI 53706 USA
[13] 104 Hullihen Hall, Newark, DE USA
[14] Univ Delaware, Newark, DE 19716 USA
[15] Univ Vermont, Burlington, VT 05405 USA
[16] Ohio State Univ, Columbus, OH 43210 USA
[17] NC State Univ, Raleigh, NC USA