Early return of spontaneous circulation (ROSC) from emergency medical technician (EMT)-witnessed OHCAs achieved by immediate CPR with and without defibrillation are strongly associated with neurologically favourable survival. (November 2015) - Hideo, Inaba; Iwasaki, Hose; Kamikura, Takahisa; Yamashita, Akira; Myjo, Yasuhiro; Ohta, Keisuke; Sakagami, Satoru; Funada, Akira