By Poggi SH   Spong CY   Ghidini A   Ossandon M   in Journal of Maternal-Fetal and Neonatal Medicine

ISSN:1476-4954|15|6|367-371

Informa Healthcare‎(2004)‎

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By Beall M.H.   Ross M.G.   Spong C.Y.   in Obstetrics and Gynecology

ISSN:0029-7844|102|5|1090-1090

Elsevier‎(2003)‎

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