- Correspondence to Tomonori Hirashima, Department of Thoracic Malignancy, Osaka Prefectural Medical Center for Respiratory and Allergic Diseases, 3-7-1 Habikino, Habikino City, Osaka 583-8588, Japan;
- Received April 8, 2016
- Revised June 9, 2016
- Accepted July 6, 2016
- First published August 3, 2016.
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