1 Victorian Cytology Service Ltd, Carlton, Vic., Australia; Department of Pharmacology and Therapeutics, University of Melbourne, Vic., Australia. Electronic address: dhawkes@vcs.org.au.
2 Victorian Cytology Service Ltd, Carlton, Vic., Australia; School of Population and Global Health, University of Melbourne, Vic., Australia.
3 Victorian Cytology Service Ltd, Carlton, Vic., Australia; Department of Obstetrics and Gynaecology, University of Melbourne, Vic., Australia.