Text and Data Mining valid from 2018-04-21
Received: 16 November 2017
Accepted: 16 April 2018
First Online: 21 April 2018
Ethics approval and consent to participate
: Institutional Review Board of Faculty of Medicine, Prince of Songkla University approved a request to waive of informed consent because this study was retrospectively chart review, generally it also will not be appropriate to attempt to contact those patients to tell them about the study retrospectively. This study was conducted in accordance with the Declaration of Helsinki and was approved by the Institutional Review Board of Faculty of Medicine, Prince of Songkla University (EC 59–237–14-4).
: The authors declare that they have no competing interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.