GI and Lymphoma Unit, Department of Medicine, The Royal Marsden National Health Service Foundation Trust, London, United Kingdom.
Oncologist. 2017 Nov;22(11):1411-1412. doi: 10.1634/theoncologist.2017-0258. Epub 2017 Aug 10.
This Letter to the Editor acknowledges the limitations of a cohort observational study compared with a randomized clinical trial and defends the results of a recent study.
这封给编辑的信承认了与随机临床试验相比,队列观察性研究的局限性,并为最近一项研究的结果辩护。