1. Division of Vascular Surgery, Department of Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shinbashi, Minato, Tokyo 105-8461, Japan
2. Division of Regenerative Medicine, Research Center for Medical Sciences, The Jikei University School of Medicine, 3-25-8 Nishi-Shinbashi, Minato, Tokyo 105-8461, Japan
3. Laboratory Animal Facilities, The Jikei University School of Medicine, 3-25-8 Nishi-Shinbashi, Minato, Tokyo 105-8461, Japan
4. The Brown University, 75 Waterman St., Providence, RI 02912, USA