- Correspondence to Dr Yuji Oba, Division of Pulmonary, Critical Care and Environmental Medicine, University of Missouri, School of Medicine, One Hospital Drive, CE 412 Columbia, MO 65212, USA;
- Received December 22, 2014
- Revised August 28, 2015
- Accepted September 27, 2015
- First published October 21, 2015.
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- Data supplement 1 - Online table 1
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- Data supplement 8 - Online table 6_8
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