Mixed strain pathogen populations accelerate the evolution of antibiotic resistance in patients by Diaz Caballero, J, Wheatley, RM, Kapel, N, López-Causapé, C, Van der Schalk, T, Quinn, A, Shaw, LP, Ogunlana, L, Recanatini, C, Britto Xavier, B, Timbermont, L, Kluytmans, J, Ruzin, A, Esser, M, Malhotra-Kumar, S, Oliver, A, MacLean, RC