SAFETY, EFFICACY AND IMMUNOGENICITY OF VB10.16, A THERAPEUTIC DNA VACCINE TARGETING HUMAN PAPILLOMAVIRUS (HPV) 16 E6 AND E7 PROTEINS FOR HIGH GRADE CERVICAL INTRAEPITHELIAL NEOPLASIA (CIN 2/3): 6-MONTH DATA FROM AN EXPLORATORY OPEN-LABEL PHASE I/2A TRIAL