ESMO expert consensus statements (ECS) on the definition, diagnosis, and management of HER2-low breast cancer

P. Tarantino, Giulia Viale, Michael F. Press, Xin Hu, Frédérique Penault‐Llorca, A. Bardia, Anna Batistatou, H.J. Burstein, L.A. Carey, Javier Cortés, C. Denkert, V. Diéras, William Jacot, A. Koutras, Alizée Lebeau, S. Loibl, Shanu Modi, M.F. Mosele, Elena Provenzano, Giancarlo Pruneri, Jorge S. Reis‐Filho, Federico Rojo, Roberto Salgado, P. Schmid, Stuart J. Schnitt, S.M. Tolaney, Dario Trapani, A. Vincent-Salomon, A.C. Wolff, George Pentheroudakis, Fabrice André, G. Curigliano