Stein, Alexander, et al. “Bevacizumab Plus Chemotherapy As First-Line Treatment for Patients With Metastatic Colorectal Cancer: Results from a Large German Community-Based Observational Cohort Study”. Acta Oncologica, vol. 54, no. 2, Feb. 2015, pp. 171-8, doi:10.3109/0284186X.2014.961649.