1 Washington State Department of Agriculture, 21 North 1st Avenue, Suite 106, Yakima, Washington 98902, United States.
2 FLAG Works, Incorporated/North American Chemical Residue Workshop (NACRW), 2910 Kerry Forest Parkway, Suite D4-388, Tallahassee, Florida 32309, United States.
3 Office of Indiana State Chemist, Purdue University, 175 South University Street, West Lafayette, Indiana 47907, United States.
4 Iowa Department of Agriculture, 2230 South Ankeny Boulevard, Ankeny, Iowa 50023, United States.