1. From the Australian Institute for Machine Learning (J.J.J.C., V.T., L.O.R., L.J.P.) and School of Public Health (J.J.J.C., V.T., K.A.H., L.O.R., L.J.P.), University of Adelaide, N Terrace, Adelaide, South Australia 5005, Australia; and BreastScreen SA, Adelaide, South Australia, Australia (M.R., A.S.H.).