1. Division of Pharmacovigilance, Office of Surveillance and Epidemiology, Center for Drug Evaluation and Research, US Food and Drug Administration , Silver Spring, MD 20993, United States
2. Department of Health Services Administration, School of Health Professions, The University of Alabama at Birmingham , Birmingham, AL 35233, United States
3. Informatics Institute, The University of Alabama at Birmingham , Birmingham, AL 35294, United States
4. Electrical & Computer Engineering, The Center for Integrated Systems, The University of Alabama at Birmingham , Birmingham, AL 35294, United States