Number of cardiologists per cardiovascular beds and in-hospital mortality for acute heart failure: A nationwide study in japan

Koshiro Kanaoka, Satoshi Okayama, Michikazu Nakai, Yoko Sumita, Kenji Onoue, Tsunenari Soeda, Kunihiro Nishimura, Rika Kawakami, Hiroyuki Okura, Yoshihiro Miyamoto, Satoshi Yasuda, Hiroyuki Tsutsui, Issei Komuro, Hisao Ogawa, Yoshihiko Saito