RT Journal Article SR Electronic T1 Foreign body inhalation: a danger of metered dose inhalers. JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 43 OP 43 VO 40 IS 330 A1 D L Cohen YR 1990 UL http://bjgp.org/content/40/330/43.2.abstract AB