Completeness and accuracy of national cancer and death registration for outcome ascertainment in trials—an ovarian cancer exemplar oleh Jatinderpal K. Kalsi, Andy Ryan, Aleksandra Gentry-Maharaj, Danielle Margolin-Crump, Naveena Singh, Matthew Burnell, Elizabeth Benjamin, Sophia Apostolidou, Mariam Habib, Susan Massingham, Chloe Karpinskyj, Robert Woolas, Martin Widschwendter, Lesley Fallowfield, Stuart Campbell, Steven Skates, Alistair McGuire, Max Parmar, Ian Jacobs, Usha Menon