PT - JOURNAL ARTICLE AU - C. Cabrera Lacalzada AU - S. Díaz-Lobato TI - Grading obesity hypoventilation syndrome severity AID - 10.1183/09031936.00059508 DP - 2008 Sep 01 TA - European Respiratory Journal PG - 817--818 VI - 32 IP - 3 4099 - http://erj.ersjournals.com/content/32/3/817.short 4100 - http://erj.ersjournals.com/content/32/3/817.full SO - Eur Respir J2008 Sep 01; 32