1. United States Department of Agriculture, Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, 9611 South Riverbend Avenue, Parlier, CA 93648, USA
2. United States Department of Agriculture, Agricultural Research Service, Appalachian Fruit Research Station, 2217 Wiltshire Rd., Kearneysville, WV 25430, USA
3. Agricultural and Environmental Chemistry Graduate Group, Department of Environmental Toxicology, University of California at Davis, 4117 Meyer Hall, Davis, CA 95616, USA