1. Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019-0065, United States
2. Department of Mathematics, University of Texas at Arlington, Arlington, Texas 76019-0408, United States
3. Agilent Technologies, Hewlett-Packard Strasse 8, D 76337 Waldbronn, Germany
4. Global FIA, 684 Sixth Avenue, Fox Island, Washington 98333, United States