PT - JOURNAL ARTICLE AU - A J Roncoroni TI - Correspondence. AID - 10.1136/thx.34.3.430 DP - 1979 Jun 01 TA - Thorax PG - 430--430 VI - 34 IP - 3 4099 - http://thorax.bmj.com/content/34/3/430.short 4100 - http://thorax.bmj.com/content/34/3/430.full SO - Thorax1979 Jun 01; 34