Platinum-etoposide chemotherapy in elderly patients with small cell lung cancer: results of a randomized multicenter phase II study assessing attenuated dose or full dose with lenogastim prophylaxis -a Forza Operativa Nazionale Italiana Carcinoma Polmonare and Gruppo Studio Tumori Polmonari Veneto (FONICAP-GSTPV) Study - Ardizzoni,A.; Favaretto,A.; Boni,L. (J Clin Oncol, 2005)