1. College of Pharmacy/Division of Pharmaceutics and Pharmaceutical Chemistry College of Medicine/Department of Physiology and Cell Biology/Dorothy M. Davis Heart and Lung Research Institute The Ohio State University Columbus OH 43210 USA
2. Verna and Marrs McLean Department of Biochemistry and Molecular Biology National Center for Macromolecular Imaging Baylor College of Medicine Houston TX 77030 USA
3. Department of Pharmaceutical Sciences University of Nebraska Medical Center Omaha NE 68198 USA