Proportion and clinical characteristics of patients who received prehospital airway or respiratory management by physicians aboard helicopters in Japan: a nationwide descriptive analysis. - Hayashi, Minoru; Irei, Kanako; Tanizaki, Shinsuke; Mizuno, Haruki; Tanaka, Jyunya; Azuma, Hiroyuki; Nagai, Hideya; Sera, Makoto; Maeda, Shigenobu (Journal of Anesthesia, 2026)