AU - Chan CM, Shorr AF TI - Black clouds and black boxes: Comment on “long-acting β2-agonist step-off in patients with controlled asthma” PT - JOUR DP - 2012 TA - Archives of Internal Medicine pages = {1375-1376}, VI - 172 IP - 18 AID - 10.1001/archinternmed.2012.3650 [doi] 4100 - http://dx.doi.org/10.1001/archinternmed.2012.3650 SO - Archives of Internal Medicine October 8, 2012 172(18):1375