Predictors of first-year survival in patients with advanced COPD treated using long-term oxygen therapy

Validation of a combined comorbidity index

Mary E. Charlson, Ted P. Szatrowski, Janey C. Peterson et al. · Journal of Clinical Epidemiology · 1994 · 6.4K citations

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The Body-Mass Index, Airflow Obstruction, Dyspnea, and Exercise Capacity Index in Chronic Obstructive Pulmonary Disease

Bartolomé R. Celli, Claudia Côté, José M. Marı́n et al. · New England Journal of Medicine · 2004 · 4K citations · Full text

Standardization of Spirometry—1987 Update

American Review of Respiratory Disease · 1987 · 2.3K citations

Pulmonary Care, Pulmonary Circulation, Pulmonary Physiology +5

Continuous or Nocturnal Oxygen Therapy in Hypoxemic Chronic Obstructive Lung Disease

NOCTURNAL OXYGEN THERAPY TRIAL GROUP · Annals of Internal Medicine · 1980 · 2.1K citations

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Changes in the normal maximal expiratory flow-volume curve with growth and aging.

Ronald J. Knudson, M D Lebowitz, Catharine J. Holberg et al. · PubMed · 1983 · 1.9K citations

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