DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

Sterne JA, Hernán MA, Reeves BC. et al.
ROBINS-I: a tool for assessing risk of bias in non-randomised studies of interventions.

BMJ 2016;
355: i4919 . doi:10.1136/bmj.i4919

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