Optimising the Duration of Adjuvant Trastuzumab in Early Breast Cancer in the UK. Issue 1 (January 2021) - Earl, H.M.; Hiller, L.; Dunn, J.; Macpherson, I.; Rea, D.; Hughes-Davies, L.; McAdam, K.; Hall, P.; Mansi, J.; Wheatley, D.; Abraham, J.E.; Caldas, C.; et al.