Biomedical Informatics Program, Stanford University, 1265 Welch Road, MSOB, X-215, MC 5479, Stanford, CA 94305-5479. Contact:khyu@stanford.edu , mpsnyder@stanford.edu.|Department of Computer Science, Stanford University, 353 Serra Mall, Stanford, CA 94305-9025.|Department of Computer Science, Stanford University, 353 Serra Mall, Stanford, CA 94305-9025.|Biomedical Informatics Program, Stanford University, 1265 Welch Road, MSOB, X-215, MC 5479, Stanford, CA 94305-5479. Contact:khyu@stanford.edu , mpsnyder@stanford.edu.|Department of Computer Science, Stanford University, 353 Serra Mall, Stanford, CA 94305-9025.|Department of Genetics, Stanford University, 300 Pasteur Dr., M-344, Stanford, CA 94305-5120.