Text and Data Mining valid from 2018-04-10
Received: 5 January 2018
Accepted: 19 March 2018
First Online: 10 April 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of the Faculty of Medicine, Chulalongkorn University (IRB No. 498/55) and was conducted in accordance with the ethical principles of the Declaration of Helsinki and the International Conference on Harmonization Good Clinical Practice guidelines. Signed informed consent were obtained from every patient prior to study enrollment.
: Not applicable
: The authors declare that they have no competing interests.