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About the article
Published Online: 2018-02-21
Published in Print: 2018-07-26
Author contributions: BP, NB, XB: study design. SD: drafted the manuscript. BP, SJ: patient recruitment. SD, BP, SJ: data acquisition. SD, BP: statistical analysis. NB,XB checked and improved content and English grammar and style of the manuscript. NB, XB commented on and edited the manuscript, which was read and approved by all authors. All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
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.