1. OP13.09: A biparietal / transverse abdominal diameter (BPD/TAD) ratio ≤1: a potential hint for open spina bifida at 11–13 weeks scan. (September 2014) Authors: Simon, E.G.; Arthuis, C.; Haddad, G.; Bertrand, P.; Perrotin, F. Journal: Ultrasound in obstetrics & gynecology Issue: Volume 44:Number 1(2014:Jul.) Page Start: 94 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗