HPV vaccine awareness, knowledge and information sources among youth in Switzerland: a mixed methods study oleh Michael J. Deml, Kristen Jafflin, Sonja Merten, Benedikt Huber, Andrea Buhl, Philip E. Tarr, Franco Muggli, Susanna Schärli Maurer, Corina L Schwendener, Laura M Kiener, Sarah Rouached, Anna Juillerat, Vincent Meier, Nejla Gültekin, Aron Baumann, Marlyse Debergh, Catherine Gruillot