Advancing oncology with federated learning: transcending boundaries in breast, lung, and prostate cancer. A systematic review by Ankolekar, A, Boie, S, Abdollahyan, M, Gadaleta, E, Hasheminasab, SA, Yang, G, Beauville, C, Dikaios, N, Kastis, GA, Bussmann, M, Khalid, S, Kruger, H, Lambin, P, Papanastasiou, G