Clinical Impact of Pre-Existing Autoantibodies in Patients With SCLC Treated With Immune Checkpoint Inhibitor: A Multicenter Prospective Observational Study oleh Yuki Sato, MD, Satoru Fujiwara, MD, Akito Hata, MD, Yoko Kida, MD, Takahiro Masuda, MD, Hisanori Amimoto, MD, Hirotaka Matsumoto, MD, Kotoko Miyoshi, MD, Kojiro Otsuka, MD, PhD, Keisuke Tomii, MD, PhD