"Doctor detectives" help diagnose mysterious illnesses with DNA analysis

For years, the Miller family has faced an uphill battle trying to find a diagnosis for their two sons, Carson and Chase. The boys, now 5 and 6 years old, have been unable to walk, stand or speak since birth. Originally they were diagnosed with cerebral palsy, but their parents felt their symptoms didn't match up, reports CBS News contributor Dr. Tara Narula.