RT Journal Article SR Electronic T1 Theophylline again? Reasons for believing JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 5 OP 6 DO 10.1183/09031936.00011309 VO 34 IS 1 A1 Cosio, B. G. A1 Soriano, J. B. YR 2009 UL https://publications.ersnet.org//content/34/1/5.abstract AB