1. Department of Natural Resource Management; Sul Ross State University; Texas; USA
2. Office of Dietary Supplements; National Institutes of Health; Bethesda; Maryland; USA
3. Western Regional Research Center; Agriculture Research Service, US Department of Agriculture; Albany; California; USA
4. Poisonous Plant Research Laboratory; Agriculture Research Service, US Department of Agriculture; Logan; Utah; USA
5. College of Pharmacy; University of Hawaii at Hilo; Hawaii; USA