Evidence for soft selective sweeps in the evolution of pneumococcal multidrug resistance and vaccine escape

Nicholas J. Croucher, Claire Chewapreecha, William P. Hanage, Simon R. Harris, Lesley McGee, Mark Van Der Linden, Jae Hoon Song, Kwan Soo Ko, Herminia Garcez Lencastre, Claudia Turner, Fan Yang, Raquel Sa-Leao, Bernard Beall, Keith P. Klugman, Julian Parkhill, Paul Turner, Stephen D. Bentley