Addition of platinum derivatives to neoadjuvant single-agent fluoropyrimidine chemoradiotherapy in patients with stage II/III rectal cancer: protocol for a systematic review and meta-analysis (PROSPERO CRD42017073064) - Hüttner, Felix; Probst, Pascal; Kalkum, Eva; Hackbusch, Matthes; Jensen, Katrin; Ulrich, Alexis; Büchler, Markus W.; Diener, Markus K. (Biomed Central, 2018)