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Andrikopoulou, Maria; Vahanian, Sevan A.; Chavez, Martin R.; Murphy, Jean; Hanna, Nazeeh; Vintzileos, Anthony M. . (2016). Improving the ultrasound detection of isolated fetal limb abnormalities. The Journal of Maternal-Fetal & Neonatal Medicine, (), 1–4. doi:10.3109/14767058.2016.1160048 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research