Association Between On-Scene Time and Number of Physicians in Helicopter Emergency Medical Services in Japan: A Retrospective Study., Hishinuma Hidekazu;Noguchi Takafumi;Hayashi Kentaro;Kikuchi Jin;Honda Arata;Iwata Noboru;Kobashi Gen;Wake Koji, Air medical journal, 44(6), 473-477, 21 Jul. 2025