1. Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
2. Division of Gastroenterology and Hepatology, Department of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA.
3. Johns Hopkins Drug Discovery, Baltimore, MD 21205, USA.
4. Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA.
5. Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
6. Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, USA.