1. Vaccine Research Center; National Institute of Allergy and Infectious Disease; National Institutes of Health; Bethesda, MD USA
2. HPV Immunology Laboratory; Frederick National Laboratory for Cancer Research; Leidos Biomedical Research, Inc.; Frederick, MD USA
3. Biostatistics Research Branch; Division of Clinical Research; National Institute of Allergy and Infectious Disease; National Institutes of Health; Bethesda, MD USA
4. Center for Cancer Research; National Cancer Institute; National Institutes of Health; Bethesda, MD USA