RT Journal Article SR Electronic T1 Is nedocromil sodium effective treatment for asthma? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 5 OP 6 DO 10.1183/09031936.93.06010005 VO 6 IS 1 A1 O'Byrne, PM A1 Cook, D YR 1993 UL https://publications.ersnet.org//content/6/1/5.abstract AB