机构:
Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
Calif Pacific Med Ctr, Res Inst, San Francisco Coordinating Ctr, San Francisco, CA USAWoodend Gen Hosp, Dept Orthopaed, NHS Grampian, Aberdeen AB15 6ZQ, Scotland
机构:
Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
Calif Pacific Med Ctr, Res Inst, San Francisco Coordinating Ctr, San Francisco, CA USAWoodend Gen Hosp, Dept Orthopaed, NHS Grampian, Aberdeen AB15 6ZQ, Scotland