17 -

17 - Yasumoto K, Osaki T, Watanabe Y, Kato H, Yoshimura T. Prognostic value of cytokeratin-positive cells in the bone marrow and lymph nodes of patiënts with resected nonsmall cell lung cancer: a multicenter prospective study. Ann Thorac Surg 76:194-201, 2003; discussion 202.