Tracing the origin of disseminated tumor cells in breast cancer using single-cell sequencing by Demeulemeester, J, Kumar, P, Møller, E, Nord, S, Wedge, D, Peterson, A, Mathiesen, R, Fjelldal, R, Zamani Esteki, M, Theunis, K, Fernandez Gallardo, E, Grundstad, A, Borgen, E, Baumbusch, L, Børresen-Dale, A, White, K, Kristensen, V, Van Loo, P, Voet, T, Naume, B