Funding for this research was provided by:
Khon Kaen University (50427)
Text and Data Mining valid from 2019-07-31
Received: 13 February 2019
Accepted: 17 July 2019
First Online: 31 July 2019
Ethics approval and consent to participate
: All subjects were informed both verbally and in writing as to the possible risks of the study before signing a consent form. The consent form was signed before the screening of subjects and approved by the Human Ethical Committee of Khon Kaen University, Thailand (approval no. HE531365). This study was also retrospectively registered in the Thai Clinical Trials Registry (TCTR), TCTR20181127002. Registered 26 November 2018 - Retrospectively registered, ExternalRef removed.
: Not applicable.
: The authors declare that they have no competing interests.