DOI:
10.1055/s-00000022
Das Gesundheitswesen
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References
de Glas NA, Kiderlen M, de Craen AJ. et al.
Assessing treatment effects in older breast cancer patients: systematic review
of observational research methods.
Cancer Treatment Reviews 2015;
41: 254-261. doi:10.1016/j.ctrv.2014.12.014
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