1. ENSCO, Inc., 4849 North Wickham Road, Melbourne, Florida 32940, United States
2. Division of Cardiology, VA San Diego Healthcare System, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
3. Department of Chemistry, Truman State University, 100 East Normal Avenue, Kirkville, Missouri 63501, United States