DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
Zhang Y, Li Z, Li H. et al.
Maternal haemoglobin concentration and risk of preterm birth in a Chinese population.
J Obstet Gynaecol 2018;
38: 32-37
DOI: 10.1080/01443615.2017.1325454.
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