1 Rutgers Institute for Translational Medicine and Science, New Brunswick, United States of America.
2 National Human Genome Research Institute, Bethesda, United States of America.
3 Division of Allergy, Pulmonary and Critical Care Medicine, University of Wisconsin School of Medicine and Public Health, Madison, United States of America.
4 Cardiovascular Research Institute, UCSF, San Francisco, United States of America.
5 Brigham & Women's Hospital, Harvard Medical School, Boston, United States of America.
6 Wake Forest School of Medicine, Winston-Salem, United States of America.
7 Pennsylvania State University, Hershey, United States of America.
8 Department of Environmental and Occupational Health, University of Pittsburgh School of Public Health, Pittsburgh, United States of America.