Henrich W, Surbek D, Kainer F, Grottke O, Hopp H, Kiesewetter H, Koscielny J, Maul H, Schlembach D, von Tempelhoff GF, Rath W. J Perinat Med. 2008 Sep 10. [Epub ahead of print]
1Departamento de Obstetrícia, Charité – University Medicine Berlin, 13353 Berlim, Alemanha.