Assessment of quality of life in MA.17: A randomized, placebo-controlled trial of letrozole after 5 years of tamoxifen in postmenopausal women - Whelan, T J; Goss, P E; Ingle, J N; Pater, J L; Tu, D; Pritchard, K; Liu, S; Shepherd, L E; Palmer, M; Robert, N J; Martino, S; Muss, H B (J Clin Oncol, 2005)