%0 Journal Article %A C P Van Schayck %A C L A Van Herwaarden %T AUTHORS' REPLY %D 1994 %R 10.1136/thx.49.2.190-a %J Thorax %P 190-191 %V 49 %N 2 %U https://thorax.bmj.com/content/thoraxjnl/49/2/190.2.full.pdf