Incident HPV 51 Infection After Prophylactic Quadrivalent Human Papillomavirus (Types 6, 11, 16, and 18) L1 Virus-Like Particle Vaccine Gardasil/Silgard® - Philippe Halfon,; Sophie Ravet; Hacène Khiri; Guillaume Penaranda; Carole Lefoll (Clinical Medicine Insights: Case Reports, 2010)