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Author(s):
Giessen, C.; Laubender, R. P.; Ankerst, D. P.; Stintzing, S.; Modest, D. P.; Mansmann, U.; Heinemann, V. 
Title:
Progression-free survival as a surrogate endpoint for median overall survival in metastatic colorectal cancer: literature-based analysis from 50 randomized first-line trials 
Journal title:
Clinical Cancer Research 
Year:
2013 
Journal volume:
19 
Month:
Jan 
Journal issue:
Pages contribution:
225--235