[1] SHAARE ZEDEK MED CTR,MALE INFERTIL UNIT,JERUSALEM,ISRAEL
[2] SHAARE ZEDEK MED CTR,DEPT OBSTET & GYNECOL,JERUSALEM,ISRAEL
[3] HEBREW UNIV JERUSALEM,HADASSAH MED SCH,IL-91010 JERUSALEM,ISRAEL
[4] KUPAT HOLIM OUTPATIENT GYNECOL CLIN,JERUSALEM,ISRAEL
[5] MINIST HLTH,EPIDEMIOL UNIT,JERUSALEM,ISRAEL
[6] CHAIM SHEBA MED CTR,CENT VIROL LAB,IL-52621 TEL HASHOMER,ISRAEL