Out-of-hospital cardiac arrest outcomes following EMS resuscitation protocol revision during the COVID-19 pandemic: a population-based study. - Kaichi R; Matsuoka Y; Norii T; Hijikata Y; Miyakoshi C; Matsuoka T; Hanamura N; Yuge N; Toda F; Itaya T; Yamada Y; Ogawa Y; et al. (Resuscitation plus, 2025)