Dr. Dan Brennan is a board-certified pediatrician at Sansum Clinic, after having received degrees at UCLA and Albany Medical College and residency training at Cedars-Sinai Medical Center in Los Angeles. He is a longtime health columnist, contributes as a medical expert for several national publications, edits several parenting and nutritional texts, and has served as a medical editor for WebMD. He is a proud husband and father of three boys, and volunteers his time as a youth coach and as board president of Dos Pueblos Little League.