Stephen Nelson Jr, MD, PhD, obtained his doctorate in biomedical sciences with an emphasis on radiation-induced mutations in 1996 from the University of California, Riverside. He has taught MCAT preparation courses for Hyperlearning and the Princeton Review as a senior biology instructor and coauthored the biology review notes for Hyperlearning’s acclaimed MCAT preparation system. He also works as a pediatrician and is involved in teaching residents and medical students the art of pediatric medicine.