Trial on refinement of early stage non-small cell lung cancer: adjuvant chemotherapy with pemetrexed and cisplatin versus vinorelbine and cisplatin: the TREAT protocol ; study protocol - Kreuter, Michael; Vansteenkiste, Johan F.; Griesinger, Frank; Hoffmann, Hans; Dienemann, Hendrik; DeLeyn, Paul; Thomas, Michael (BMC cancer, 2007)