1 Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, CA, USA.
2 Departments of Human Genetics, Medicine, and Microbiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.
3 Department of Biostatistics and Center for Statistical Genetics, University of Michigan, Ann Arbor, MI, USA.
4 Department of Genetics, University of North Carolina, Chapel Hill, NC, USA.
5 Eli & Edythe Broad Center of Regenerative Medicine & Stem Cell Research, University of California Los Angeles, Los Angeles, CA, USA.
6 Howard Hughes Medical Institute, University of California Los Angeles, Los Angeles, CA, USA.
7 Institute of Clinical Medicine, Internal Medicine, University of Eastern Finland and Kuopio University Hospital, Puijonlaaksontie 2, Kuopio, Finland.