Impact of areal socioeconomic status on prehospital delay of acute ischaemic stroke: retrospective cohort study from a prefecture-wide survey in Japan oleh Tsuyoshi Ohta, Naoki Fukui, Tetsuya Ueba, Hitoshi Fukuda, Tomohiko Izumidani, Satoru Hayashi, Hiroyuki Nishimura, Yuki Hyohdoh, Hitoshi Ninomiya, Yusuke Ueba, Yu Kawanishi, Tomohito Kadota, Fumihiro Hamada, Motonobu Nonaka, Kei Kawada, Maki Fukuda, Yo Nishimoto, Nobuhisa Matsushita, Yuji Nojima, Namito Kida, Akihito Moriki