A phase I clinical trial to evaluate the tolerability and safety of an allogeneic iPSC-derived iNKT cell and α-GalCer-pulsed autologous DC combination therapy for patients with recurrent and advanced head and neck cancer: A study protocol - Tomoya Kurokawa; Tomohisa Iinuma; Haruna Ebisu; Tomoha Yanagidaira; Yosuke Inaba; Tadami Fujiwara; Yoko Hattori; Tominaga Fukazawa; Takahiro Aoki; Haruhiko Koseki; Hideki Hanaoka; Toyoyuki Hanazawa; et al. (PLoS ONE, 2026)