- Phase I: Patients receive pNGVL4a-Sig/E7(detox)/HSP70 DNA vaccine subcutaneously once in weeks 0, 4, and 8 in the absence of disease progression or unacceptable toxicity. Patients undergo colposcopy in week 8, 15 and 19 and a therapeutic loop electrosurgical excision procedure (LEEP) in week 15.