1. College of Pharmacy; Department of Pharmaceutical Sciences; University of Nebraska Medical Center; Omaha NE 68198-6125 USA
2. College of Pharmacy; Department of Pharmacy Practice; University of Nebraska Medical Center; Omaha NE 68198-6145 USA
3. Eppley Institute for Research in Cancer and Allied Diseases; University of Nebraska Medical Center; Omaha NE 68022 USA
4. Department of Biological Systems Engineering; University of Nebraska-Lincoln; Lincoln NE 68588 USA
5. Division of Natural Science and Mathematics; Chaminade University of Honolulu; Honolulu HI 96816 USA