Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. masao@hgc.jp|Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. masao@hgc.jp|Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. masao@hgc.jp|Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. masao@hgc.jp|Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. masao@hgc.jp|Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. masao@hgc.jp|Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. masao@hgc.jp|Human Genome Center, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. masao@hgc.jp