RT Journal Article SR Electronic T1 Contamination of rhinovirus stocks with poliovirus type 1 JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 579 OP 579 DO 10.1136/thorax.58.7.579 VO 58 IS 7 A1 T Wilkinson YR 2003 UL http://thorax.bmj.com/content/58/7/579.abstract AB