Task: Answer Verification
Input (English): Question: Does the etiology of pectus carinatum involve overgrowth of costal cartilage and undergrowth of ribs?
Answer: In patients with symmetric pectus carinatum, the lengths of costal cartilage were longer but the lengths of rib were shorter than those of controls. These findings may supports that the overgrowth of costal cartilage was not the only factor responsible for pectus carinatum.
Output (English): yes