Is pemetrexed more effective in patients with non-squamous histology? A retrospective analysis of a phase III trial of pemetrexed vs docetaxel in previously treated patients with advanced non-small cell lung cancer (NSCLC) [abstract] - Peterson, P; Park, K; Fossella, F; Gatzemeier, U; John, W; Scagliotti, G (Eur J Cancer Suppl, 2007)