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  1. List of Excluded Studies - Safety of Vaccines Used for Routine Immunization in the United States: An Update - NCBI ... 
    https://www.ncbi.nlm.nih.gov/books/NBK572039
    ... 19027046. Study design [ PubMed : 19027046 ] [ CrossRef ] 2130. Group FIS. Quadrivalent vaccine against human papillomavirus to prevent high- ... 17494925. Publication year [ PubMed : 17494925 ] [ CrossRef ] 2131. Group FIS. Quadrivalent vaccine against human papillomavirus to prevent high- ...