Comparison of antibody responses to human papillomavirus vaccination as measured by three assays oleh Hilary Ann Robbins, Troy J Kemp, Carolina ePorras, Ana Cecilia eRodriguez, Mark eSchiffman, Sholom eWacholder, Paula eGonzalez, John eSchiller, Douglas eLowy, Sylviane ePoncelet, Mark eEsser, Katie eMatys, Allan eHildesheim, Ligia A Pinto, Rolando eHerrero, Mahboobeh eSafaeian