Optimal step-down approach for pediatric asthma controlled by salmeterol/fluticasone: A randomized, controlled trial (OSCAR study) oleh Kenichi Akashi, Hidetoshi Mezawa, Yuichi Tabata, Jun Atsuta, Reiko Tokuda, Yasusuke Kawada, Tetsuro Kitamura, Hiroko Murasugi, Hiroaki Ito, Masahiko Tabata, Kenichiro Shirao, Satoshi Sato, Hideko Nishimura, Masako Fujiwara, Kei Masuda, Hirokazu Arakawa, Yuichi Adachi, Shigemi Yoshihara, Takao Fujisawa, Toshio Katsunuma