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APA Citation
Hinkson, L., Faensen, A. L., Armbrust, R., & Henrich, W. (n.d.). the O-Sign: early recognition of O-shaped abdominal distension avoids drastic surgical intervention in Ogilvie Syndrome after caesarean section. European journal of obstetrics, gynecology, and reproductive biology, 204, 126–127. http://access.bl.uk/ark:/81055/vdc_100035860801.0x000058