1. Liver Imaging Group, Dept. of Radiology, Univ. of California at San Diego, 9452 Medical Ctr. Dr., L3W 501, La Jolla, CA 92037,
2. BioAcoust. Res. Lab., Dept. of Elec. and Comput. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL
3. Liver Imaging Group, Dept. of Radiology, Univ. of California at San Diego, La Jolla, CA
4. Computational and Appl. Statistics Lab., San Diego Supercomputing Ctr., Univ. of California at San Diego, La Jolla, CA
5. Dept. of Medicine, Univ. of California at San Diego, La Jolla, CA
6. Dept. of Radiology, Univ. of California at San Diego, La Jolla, CA
7. Dept. of Food Sci. and Human Nutrition, Univ. of Illinois at Urbana-Champaign, Urbana, IL