1. Department of Chemistry and Department of Chemical Engineering, Texas A&M University, College Station, Texas 77842, United States
2. Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
3. Department of Pharmaceutical Sciences, Southern Illinois University Edwardsville School of Pharmacy, Edwardsville, Illinois 62026, United States
4. Covidien Pharmaceutical R&D, Hazelwood, Missouri 63042, United States