A Randomized Trial of Letrozole in Postmenopausal Women After Five Years of Tamoxifen Therapy for Early-Stage Breast Cancer

Goss, Paul E.; Ingle, James N.; Martino, Silvana; Robert, Nicholas J.; Muss, Hyman B.; Piccart, Martine J.; Castiglione, Monica; Tu, Dongsheng; Shepherd, Lois E.; Pritchard, Kathleen I.; Livingston, Robert B.; Davidson, Nancy E.; Norton, Larry; Perez, Edith A.; Abrams, Jeffrey S.; Therasse, Patrick; Palmer, Michael J.; Pater, Joseph L.