info:oai:pure.iiasa.ac.at:4236info:ofi/fmt:xml:xsd:journalNowakM.A.Nowak, M.A.MayR.M.May, R.M.SigmundK.Sigmund, K.6532375June 19950028-0836Antigenic oscillations and shifting immunodominance in HIV-1 infectionsNature606-611article