1. Division of Clinical Pharmacology, Department of Medicine, Johns Hopkins University, 725 North Wolfe Street, Baltimore, MD 21205, USA.
2. Johns Hopkins Malaria Research Institute, Johns Hopkins University, Baltimore, MD 21205, USA.
3. Department of Molecular Microbiology and Immunology, Johns Hopkins University, Baltimore, MD 21205, USA.
4. Department of Pharmacology and Molecular Sciences, Johns Hopkins University, Baltimore, MD 21205, USA.