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American College of Physicians, American Thoracic Society, and Marvin I. Schwarz. Pulmonary Medicine and Critical Care: Medical Knowledge Self-assessment Program. 2nd ed. Philadelphia, PA: American College of Physicians-American Society of Internal Medicine, 1998.

American College of Physicians, et al. Pulmonary Medicine and Critical Care: Medical Knowledge Self-assessment Program. 2nd ed. American College of Physicians-American Society of Internal Medicine, 1998.