DOI:
10.1055/s-00000095
Zeitschrift für Geburtshilfe und Neonatologie
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References
Laine K, Gissler M, Pirhonen J.
Changing incidence of anal sphincter tears in four Nordic countries through the last decades.
Eur J Obstet Gynecol Reprod Biol 2009;
146: 71-75
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