Subjects: EVALUATION research; RESEARCH funding; QUESTIONNAIRES
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Subjects: RESEARCH; RESEARCH methodology; EVALUATION research
Subjects: RESEARCH; HOSPITAL emergency services; RESEARCH methodology
Subjects: AIR pollution; RESEARCH; PROTEASE inhibitors
Subjects: OBSTRUCTIVE lung disease treatment; OBSTRUCTIVE lung diseases patients; PHYSIOLOGICAL effects of tobaccoUNITED StatesAMERICAN Thoracic Society
Subjects: OZONE; LUNG diseases; OBSTRUCTIVE lung diseasesCHINA
Subjects: OBSTRUCTIVE lung disease diagnosis; RESEARCH; RESEARCH methodology
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Subjects: AIR pollutants; OBSTRUCTIVE lung diseases; CHRONIC diseasesCHINA
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