1. 1253 University of Oregon, Eugene, Oregon 97403-1253, United States
2. Área Académica
de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, C.P. 42184, México
3. CAMCOR, University of Oregon, 1443 E. 13th Avenue, Eugene, Oregon 97403, United States