Task: Answer Verification
Input (English): Question: Is aKAP9 a genetic modifier of congenital long-QT syndrome type 1?
Answer: AKAP9 has been identified as an LQTS-type 1-modifying gene. Variants investigated altered heart rate-corrected QT interval irrespective of mutation status, as well as cardiac event risk, and disease severity, in mutation carriers.
Output (English): yes