http://www.has-sante.fr/portail/jcms/c_1108586/determination-prenatale-du-genotype-rhd-foetal-a-partir-du-sang-maternel-document-d-avis http://www.has-sante.fr/portail/jcms/c_1108579/document-d-avis-determination-prenatale-du-genotype-rhd-foetal-a-partir-du-sang-maternel 2011 France French assessment of professional actions Rh-Hr blood-group system genotype Rho(D) antigen prenatal diagnosis