1. U.S. Department of Agriculture, Agricultural Research Service, Box 7625, North Carolina State University, Raleigh, NC 27695-7625
2. North Carolina State University, Department of Poultry Science, Mycotoxin Laboratory, Box 7636, Raleigh, NC 27695-7636
3. North Carolina State University, Department of Statistics, Box 8203, Raleigh, NC 27695-8203