250. Towards omitting breast cancer surgery in selective patient groups: Assessment of pathologic complete response after primary systemic treatment using multiple biopsies 'The MICRA trial'. Issue 9 (September 2016) - Van der Noordaa, M.; Vrancken Peeters, M.J.; Loo, C.; Van de Vijver, K.; Rutgers, E.; Francken, A.B.; Van der Pol, C.; Van Duijnhoven, F.