1. Genetic Disease Research Branch, National Human Genome Research Institute National Institutes of Health Bethesda Maryland USA
2. Medical Genetics Branch, National Human Genome Research Institute National Institutes of Health Bethesda Maryland USA
3. Roslin Institute University of Edinburgh, Easter Bush Edinburgh UK
4. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, Western General Hospital University of Edinburgh Edinburgh UK
5. NIH Intramural Sequencing Center, National Human Genome Research Institute National Institutes of Health Bethesda Maryland USA
6. Department of Experimental and Clinical Pharmacology University of Minnesota Minneapolis Minnesota USA
7. Office of the Clinical Director, National Human Genome Research Institute National Institutes of Health Bethesda Maryland USA