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"WORLD JOURNAL OF SURGICAL ONCOLOGY Singh et al World Journal of Surgical Oncology 2014, 12 355 http //www wjso com/content/12/1/355 RESEARCH Open Access Rectal cancer surgery in older"
<https://1library.net/document/qod3mojz-rectal-cancer-surgery-increase-postoperative-complications-retrospective-analysis.html>