1. Radioisotope Facilities for Medical Science, Advanced Science Research Promotion Center, Mie University, Edobashi 2-174, Tsu, Mie, 514-8507, Japan
2. Department of Liposome Bioengineering, Graduate School of Engineering, Mie University, Kurimamachiya-cho 1577, Tsu, Mie, 514-8507, Japan
3. Prefectural University of Hiroshima, Nanatsuka 562, Shobara, Hiroshima, 727-0023, Japan