RT Journal Article SR Electronic T1 Defining low-dose corticosteroid: the pendulum still oscillates JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 574 OP 576 DO 10.1183/09031936.00030415 VO 46 IS 2 A1 Takashi Tagami A1 Hiroki Matsui A1 Hideo Yasunaga YR 2015 UL http://erj.ersjournals.com/content/46/2/574.2.abstract AB