Funding for this research was provided by:
Received: 27 October 2017
Accepted: 9 January 2018
First Online: 12 January 2018
Ethics approval and consent to participate
: Patients provided written informed consent to participate in the study, and this study was approved by the Institutional Review Board of Kochi Medical School, Kochi University.
: Patients provided consent for individual patient data to be published.
: The authors declare that they have no competing interests.
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