1. Department of Medicine; David Geffen School of Medicine; University of California Los Angeles; Los Angeles California
2. Division of General Internal Medicine; Department of Medicine; David Geffen School of Medicine, University of California Los Angeles; Los Angeles California
3. David Geffen School of Medicine; University of California Los Angeles; Los Angeles California
4. Department of Medicine Statistics Core; David Geffen School of Medicine, University of California Los Angeles; Los Angeles California