Gerard E. Mullin, MD, is an associate professor of medicine at The Johns Hopkins Hospital. Dr. Mullin has more than twenty years of clinical experience in the field of integrative gastroenterology. He is an honorary member of the American Dietetic Association and a recipient of the Grace Goldsmith Award.
Mike Chamberlain is an actor and voice-over performer, as well as an AudioFile Earphones Award-winning audiobook narrator. Along with animation and video game characters, Mike performs narration and voices promos for television. He lives with his wife and daughter in Southern California.