1. Rocky Vista College of Osteopathic Medicine, Ivins, UT, U.S.A.;
2. Department of Chemistry & Biochemistry, University of Oregon, Eugene, OR, U.S.A.;
3. Department of Chemistry & Biochemistry, Fort Lewis College, Durango, CO, U.S.A.;
4. Department of Chemistry, Columbia Basin College, Pasco, WA, U.S.A.