Dr. Cook, medical editor of Mayo Clinic Guide to Your Baby’s First Years, 2nd Edition, is an Assistant Professor of Pediatrics at the College of Medicine, Mayo Clinic. He is the present course director for Mayo Clinic Pediatric Days, Mayo Clinic Summer Pediatric Review and the Rochester-Mayo Clinic T. Denny Sanford Pediatric Symposium. A graduate of the University of North Dakota School of Medicine, he completed his Pediatric Residency at Mayo Clinic and has been Board Certified in General Pediatric Medicine for over 25 years. He currently is a member of the Division of Community Pediatric and Adolescent Medicine at Mayo Clinic. His research interests include newborn jaundice and transcutaneous bilirubin measurements. Father of three, including twins, he has cared for thousands of infants and children in more than 25 years of pediatric practice.