1. Alliance Protein Laboratories, San Diego, CA 92130, USA
2. Research and Development Division, Kyokuto Pharmaceutical Industrial Co., Ltd., Tahahagi 318-0004, Japan
3. Bio-Diagnostic Reagent Technology Center, Sysmex Corporation, Sayama 350-1332, Japan
4. Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan