1 Center for Liver Diseases, Department of Medicine, Inova Fairfax Hospital, Falls Church, VA, USA; Betty & Guy Beatty Center for Integrated Research, Inova Health System, Falls Church, VA, USA. Electronic address: zobair.younossi@inova.org.
2 Betty & Guy Beatty Center for Integrated Research, Inova Health System, Falls Church, VA, USA.
3 Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH, USA.