Fig. 1From: Clinical option of pemetrexed-based versus paclitaxel-based first-line chemotherapeutic regimens in combination with bevacizumab for advanced non-squamous non-small-cell lung cancer and optimal maintenance therapy: evidence from a meta-analysis of randomized control trialsOverview of study search and selection. A list of excluded papers after reading titles and abstracts can be found in additional file 1Back to article page