ROBERT S. ROSENBERG, DO, FCCP, is the medical director of the Sleep Disorders Center of Prescott Valley, Arizona and sleep medicine consultant for Mountain Heart Health Services in Flagstaff, Arizona. Dr. Rosenberg is board certified in sleep medicine, pulmonary medicine, and internal medicine. He is a contributing sleep expert blogger at EverydayHealth.com, a weekly blogger at Consumer Health Digest, and his advice has appeared in Women's Health, Prevention, Ladies' Home Journal, Parenting, and O Magazine, among others. Dr. Rosenberg appears on TV, speaks on radio programs, and gives lectures throughout the country on matters concerning sleep medicine.