Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology (25305036, 17K11916)
Text and Data Mining valid from 2020-01-13
Received: 29 September 2019
Accepted: 30 December 2019
First Online: 13 January 2020
Ethics approval and consent to participate
: This study follows international and national regulations in accordance with the Declaration of Helsinki and was approved by the Ethics Committee of Human Genetic Research at the Health Sciences University of Hokkaido, Japan, and the Ethical Committee at the University of Peradeniya, Sri Lanka. All patients signed informed consent before being included in this study, and their personal data were maintained confidential during this research.
: Not applicable.
: The authors declare that they have no competing interests.