title: Reply to P.E. Castle.
authors.affiliation: National Cancer Institute, National Institutes of Health, Bethesda, MD.
authors.forename: Aimée R
authors.initials: AR
authors.lastname: Kreimer
authors.forename: Mattias
authors.initials: M
authors.lastname: Johansson
authors.forename: Allan
authors.initials: A
authors.lastname: Hildesheim
authors.forename: Michael
authors.initials: M
authors.lastname: Pawlita
authors.forename: Paul
authors.initials: P
authors.lastname: Brennan
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis*; D005260:Female; D006258:Head and Neck Neoplasms / Q000453:epidemiology* / Q000821:virology*; D052162:Human papillomavirus 16 / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D030361:Papillomavirus Infections / Q000453:epidemiology*
chemical_list: D000914:Antibodies, Viral