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About the article
Published Online: 2016-01-21
Published in Print: 2016-11-01
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: Professor Olle Soder was financially supported by the Swedish Research Council. This study was funded by the Thailand Research Fund (Grant No. MRG5580203).
Employment or leadership: None declared.
Honorarium: None declared.
Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.