1. Texas Therapeutics Institute, The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77054, United States
2. Guy Harris Consulting, 464 Fairview Road, Belington, West Virginia 26250, United States
3. Departments of Medicine and Molecular Genetics & Microbiology, Duke University Medical Center, Durham, North Carolina 27710, United States
4. Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States