1. J. Craig Venter Institute, La Jolla, California, USA
2. Department of Pediatrics and Adolescent Medicine, Oulu University Hospital, Oulu, Finland
3. PEDEGO Research Unit, Biocenter Oulu and Medical Research Center Oulu, University of Oulu, Oulu, Finland
4. J. Craig Venter Institute, Rockville, Maryland, USA
5. Ecology and Genetics, University of Oulu, Finland