Publisher
- centers for disease control & prevention (cdc)6
- oxford university press (oup)6
- oxford university press / usa6
- public library of science (plos)4
- blackwell verlag3
- centers for disease control and prevention (cdc)3
- elsevier gmbh3
- lippincott williams & wilkins3
- national center for infectious diseases, centers for disease control and prevention (cdc)3