1. Department of Biological Sciences; Graduate School of Science and Technology; Kumamoto University; 2-39-1 Kurokami; Kumamoto; 860-8555; Japan
2. Division of Hematopoiesis; Center for AIDS Research; Kumamoto University; 2-2-1 Honjo; Kumamoto; 860-0811; Japan
3. Department of Zoology; Jahangirnagar University; Savar; Dhaka; 1342; Bangladesh
4. Department of Medical Biology; Tokyo Metropolitan Institute of Medical Science; 2-1-6 Kamikitazawa; Tokyo; 156-8506; Japan