Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu|Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu|Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu|Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu|Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu|Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu|Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu|Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu|Stanford Genome Technology Center, Stanford University, Palo Alto, California, USA. curts@stanford.edu