1 Department of Internal Medicine, Institute of Medical Sciences, Mongolian National University of Medical Sciences, Ulaanbaatar, 14210, Mongolia.
2 Department of Health Research, Graduate School, Mongolian National University of Medical Sciences, Ulaanbaatar, 14210, Mongolia.
3 College of Medicine and Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80756, Taiwan. daichiayen@gmail.com.
4 Department of Internal Medicine and Department of Occupational and Environmental Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, No. 100, Tzyou 1st Road, Kaohsiung, 80756, Taiwan. daichiayen@gmail.com.