Proffered Paper: A comparison of four methods of mammographic density measurement in the UK Predicting Risk Of Cancer At Screening (PROCAS) study – on behalf of the PROCAS Study team. (July 2016) - Astley, S.; Harkness, E.; Sergeant, J.; Stavrinos, P.; Warren, R.; Wilson, M.; Brentnall, A.; Cuzick, J.; Howell, A.; Evans, G.