Martins W P, Nastri C O
Department of Obstetrics and Gynecology, Medical School of Ribeirao Preto, University of Sao Paulo (FMRP-USP), Ribeirao Preto, Brazil; Faculty of Technology in Health - Ultrasonography School of Ribeirao Preto (FATESA-EURP), Ribeirao Preto, Brazil.
Ultrasound Obstet Gynecol. 2014 Apr;43(4):479-80. doi: 10.1002/uog.13320.