1 Department of Internal Medicine, University of Nevada Las Vegas School of Medicine, Las Vegas, NV, United States.
2 Department of Medicine, University of Arizona College of Medicine, Tucson, AZ, United States.
3 University of Nevada Reno School of Medicine, Reno, NV, United States.
4 Department of Psychology, Northeastern University, Boston, MA, United States.
5 Division of Hepatology, Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Republic of Korea.
6 Department of Internal Medicine, University of Nevada Las Vegas School of Medicine, Las Vegas, NV, United States. Electronic address: ji.yoo@unlv.edu.