 Secondary outcome criteria Percentage of procedures with keyboard positive for HPV Percentage of procedures with visible rupture of probe cover Percentage of procedures with visibly tainted probes Percentage of procedures with visible rupture of probe cover during previous procedure Percentage of procedures with visibly tainted probes during previous procedure Percentage of presence of each disinfection guideline item since last procedure and before the probe is tested for the presence of HPV Percentage of centers with a written protocol complying with disinfection guidelines Percentage of centers with traceability of disinfection procedures. 