Clinical‐grade validation of whole genome sequencing reveals robust detection of low‐frequency variants and copy number alterations in CLL by Klintman, J, Barmpouti, K, Knight, S, Robbe, P, Dreau, H, Clifford, R, Ridout, K, Burns, A, Timbs, A, Bruce, D, Antoniou, P, Sosinsky, A, Becq, J, Bentley, D, Hillmen, P, Taylor, J, Caulfield, M, Schuh, A