1. Department of Anesthesiology & Intensive Care, Osaka University Graduate School of Medicine, 2-2 Yamadaoka Suita, Osaka 565-0871, Japan
2. Department of Breast Regenerative Medicine, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
3. Department of Plastic Surgery, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan
4. Department of Pain Medicine, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan