Cyclic-alternating versus response-oriented chemotherapy in small-cell-lung cancer: a German multicenter randomized trial of 321 patients. - Wolf,M.; Pritsch,M.; Drings,P.; Hans,K.; Schroeder,M.; Flechtner,H.; Heim,M.; Hruska,D.; Mende,S.; Becker,H.; Dannhäuser,J.; Lohmüller,R.; et al. (J Clin Oncol, 1991)