1. David Geffen School of Medicine at UCLADepartment of Family Medicine Los Angeles CA USA
2. University of California at Los AngelesFielding School of Public Health Los Angeles CA USA
3. University of California at Los AngelesMedical Imaging Informatics Group Los Angeles CA USA
4. Northwestern UniversityFeinberg School of Medicine Chicago IL USA
5. Department of Epidemiology and Preventive MedicineUniversity of Regensburg Germany
6. Institute for Community MedicineUniversity Medicine Greifswald Greifswald Germany