Dr. Charles "Pat" Davis, MD, PhD is a board certified Emergency Medicine doctor who currently practices as a consultant and Emergency Medicine staff member. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA. He is an author, editor and Board member of MedicineNet.com, has published over 350 scientific and medically-related articles and is CEO of CPD Health Consultants, LLC.