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APA Citation
van Delft, K., Thakar, R., Sultan, A. H., & Kluivers, K. B. (n.d.). does the prevalence of levator ani muscle avulsion differ when assessed using tomographic ultrasound imaging at rest vs on maximum pelvic floor muscle contraction?. Ultrasound in obstetrics & gynecology, 46, 99–103. http://access.bl.uk/ark:/81055/vdc_100025951922.0x000063