1. Poisonous Plant
Research Laboratory, Agricultural Research Service, U.S. Department
of Agriculture, 1150 East 1400 North, Logan, Utah 84341, United States
2. Institute
of Veterinary, Animal and Biomedical Sciences, Massey University, Private
Bag 11222, Palmerston North, Manawatu 4442, New Zealand
3. University of Illinois at Urbana−Champaign, 1816 South Oak Street, Champaign, Illinois 61820, United States