If your pediatrician has any questions about your child's heart, he or she can refer him to a pediatric cardiologist. Pediatric cardiologists specialize in diagnosing and treating heart problems in children. In children requiring cardiac surgery, pediatric cardiologists work with pediatric cardiac s...

Gastroenterologists are doctors trained in diagnosing and treating digestive system (GI) and liver problems. They have 5 to 6 years of specific instruction after clinical school. You may need to visit...