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Publisher
- elsevier b.v.43
- elsevier bv25
- cambridge university press18
- biomed central14
- american medical association6
- aarhus univ, dept publ hlth, aarhus, denmark5
- biomarin pharmaceut inc, novato, ca usa.;geisinger hlth, biomed & translat informat, danville, pa usa5
- escholarship, university of california5
- geisinger hlth, dept populat hlth sci, danville, pa usa5