Affiliation: | (1) Virology Department, Timone Hospital, Marseille, France;(2) Department of Gynecology and Obstetrics, Conception Hospital, Marseille, France;(3) Maternity of Belle de Mai, Marseille, France;(4) Laboratoire de Virologie, Hôpital de la Timone, Boulevard Jean Moulin, F-13385 Marseille-5, France |