1. Division of Nuclear Medicine, Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. 2. Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. 3. Department of Transplantation Surgery, Sahlgrenska Academy, University of Göthenburg, Göteborg, Sweden. 4. Department of Obstetrics and Gynecology, Sahlgrenska Academy, University of Göthenburg, Göteborg, Sweden. 5.