DOI:
10.1055/s-00000020
Geburtshilfe und Frauenheilkunde
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References
American Society of Anesthesiologists.
ASA Physical Status Classification System. 2011.
Online:
https://www.asahq.org/For-Members/Clinical-Information/ASA-Physical-Status-Classification-System.aspx last access: 09.12.2014
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