Mycobacterium avium complex lung infection in a patient with anti-interferon-γ autoantibodies and previous Mycobacterium abscessus neck lymphadenitis Lih-shinn Wang 1 , Chia-ching Jackie Wang 3 , Cheng-lung Ku 4,5 , Jen-jyh Lee 2 , Chia-jung Chiang 6 , Po-ren Hsueh 7 .