John E. Hall’s Pocket Companion to Guyton and Hall Textbook of Medical Physiology, 12th Edition offers at-a-glance reference to the most important facts and concepts from one of the world’s favorite medical physiology texts, all in a portable, quick-access format. It assembles all of the physiologic data and principles needed for the study of medicine, presents them in a concise, no-nonsense manner, and fits them into your pocket - for convenient access anytime!