Abstract
[This retracts the article DOI: 10.1186/s13013-015-0043-x.].
Highlights
This article [1] has been retracted by the authors and Editor as it was republished by the journal in error
This mistake was not detected by the journal and led to duplicate publication of the article [2]
The authors and Editor apologize for this error and any inconvenience caused
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Summary
Introduction
This article [1] has been retracted by the authors and Editor as it was republished by the journal in error.
Results
Conclusion
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