David M. Allan received his medical training at Cambridge University and Guy's Hospital in England. He was chief resident in Pediatrics at Bellevue Hospital in New York City before moving to San Diego, California. Dr. Allan has worked as a family physician in England, a pediatrician in San Diego, and an associate dean at the University of California, San Diego School of Medicine. He has designed, written, and produced more than 100 award-winning multimedia programs with virtual reality as their conceptual base. Karen D. Lockyer Karen Lockyer holds a degree in Health Information (RHIT), a national coding certification (CPC), and a BS from Rutgers University. She is also a credentialed member of AHIMA (American Health Information Management Association) and AAPC (American Academy of Professional Coders). Mrs. Lockyer has worked in medical practice administration and the Health Information Management fields for many years. She has taught medical terminology for high school, community college, and workforce development areas at the National Institutes of Health and the federal government's Office of Personnel Management. She has also taught coding and billing for undergraduate and certificate programs at the community college level.