1. Risk factors of importance–the patient;Mallon;Probl Anesth,1992
2. Predictors of pulmonary complications following abdominal surgery;Brooks-Brunn;Chest,1997
3. Askrog VF, Smith TC, Eckenhoff JE, et al. Changes in pulmonary ventilation during spinal anesthesia. Surg Gynecol Obstet 1964;119:563.
4. Tarhan S, Moffit EA, Sessler AD, et al. Risk of anesthesia and surgery in patients with chronic bronchitis and chronic obstructive pulmonary disease. Surgery 1973;74:720.
5. Mitchell CK, Smoger SH, Pfiefer MP, et al. Multivariate analysis of factors associated with postoperative pulmonary complications following elective surgery. Arch Surg 1998:194–198.