PT - JOURNAL ARTICLE AU - Begin, P AU - Grassino, A TI - CO2-response in chronic obstructive pulmonary disease DP - 1999 May 01 TA - European Respiratory Journal PG - 1212--1214 VI - 13 IP - 5 4099 - http://erj.ersjournals.com/content/13/5/1212.short 4100 - http://erj.ersjournals.com/content/13/5/1212.full SO - Eur Respir J1999 May 01; 13