Department of Pulmonary Medicine,Beijing Tian Tan Hospital,Capital Medical University,Beijing 100050,China;
Department of Pulmonary Medicine,Beijing Tian Tan Hospital,Capital Medical University,Beijing 100050,China;
Department of Pulmonary Medicine,Beijing Tian Tan Hospital,Capital Medical University,Beijing 100050,China;
Department of Pulmonary Medicine,Beijing Tian Tan Hospital,Capital Medical University,Beijing 100050,China;
Department of Pulmonary Medicine,Beijing Tian Tan Hospital,Capital Medical University,Beijing 100050,China;