Journal of Clinical Epidemiology · 2001 · 201 citations · 12 references
AsthmaAdvanced Lung DiseaseRespiratory DiseasesBreathing DisordersPediatricsMedicineChronic Airway ObstructionPulmonary DiseaseComorbidity
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Can Comorbidity Be Measured By Questionnaire Rather than Medical Record Review?
Jeffrey N. Katz, Lily Chang, O. Sangha et al. · Medical Care · 1996 · 1K citations