1. Cancer Research UK http://www.cancerresearchuk.org/health-professional/cancer-statistics/statistics-by-cancer-type/vulval-cancer#
2. Trends in incidence and survival of women with invasive vulvar cancer in the United States and Canada: a population-based study;Akhtar-Danesh;Gynecol Oncol,2014
3. Office for National Statistics on request 2014 http://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/deaths/bulletins/deathregistrationsummarytables/pr
4. ISD Scotland on request 2014 https://www.nrscotland.gov.uk/statisticsanddata/statistics/statistics-by-theme/vital-events/vital-events-reference-tables
5. National Cancer Intelligence Network Vulval cancer: Trends and variations by age http://www.ncin.org.uk/publications/data_briefings/vulval_cancer_trends_and_variations_by_age