Case−Control Study of Risk Factors for Meningococcal Disease in Chile oleh Andrea Olea, Isabel Matute, Claudia González, Iris Delgado, Lucy Poffald, Elena Pedroni, Tania Alfaro, Macarena Hirmas, Manuel Nájera, Ana Gormaz, Darío López, Sergio Loayza, Catterina Ferreccio, Doris Gallegos, Rodrigo Fuentes, Pablo Vial, Ximena Aguilera