1. Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
2. Department of Chemistry, University of the Pacific, Stockton, California 95211, United States
3. Shimadzu Scientific Instruments, Pleasanton, California 94566, United States
4. SCIEX, 71 Four Valley Drive, Concord, Ontario L4K 4 V8, Canada