PT - JOURNAL ARTICLE AU - W. Zetterquist AU - J.O.N. Lundberg AU - K. Alving TI - Exhaled carbon monoxide is not elevated in patients with asthma or cystic fibrosis AID - 10.1183/09031936.02.00078702a DP - 2003 Jan 01 TA - European Respiratory Journal PG - 197--198 VI - 21 IP - 1 4099 - http://erj.ersjournals.com/content/21/1/197.2.short 4100 - http://erj.ersjournals.com/content/21/1/197.2.full SO - Eur Respir J2003 Jan 01; 21