Afatinib use in non-small cell lung cancer previously sensitive to epidermal growth factor receptor inhibitors: The United Kingdom Named Patient Programme. - Khan, F.; Ottensmeier, C.; Popat, S.; Dua, D.; Dorey, N.; Ellis, S.; Szabo, M.; Upadhyay, S.; Califano, R.; Chan, S.; Lee, L.; Ali, C.W.; et al. (European Journal of Cancer, 2014)