1. Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, Sapporo, Japan
2. Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
3. Department of Thoracic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
4. Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan