DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

American College of Obstetricians and Gynaecologists.
Novel Coronavirus 2019 (COVID-19).

https://www.acog.org/clinical/clinical-guidance/practice-advisory/articles/2020/03/novel-coronavirus-2019 ; aufgerufen am 2.April 2020

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