1. Center for Child Health Research; Faculty of Medicine and Life Sciences; University of Tampere and University Hospital; Tampere Finland
2. Department of Medical Microbiology and Immunology; University of Turku; Turku Finland
3. School of Health Sciences; Faculty of Social Sciences; University of Tampere; Tampere Finland
4. Department of Pediatrics; Seinäjoki Central Hospital; Seinäjoki Finland
5. Department of Pediatrics; Kuopio University Hospital; Kuopio Finland
6. Department of Pediatrics; University of Turku and University Hospital; Turku Finland
7. St. Giles Laboratory of Human Genetics of Infectious Diseases; Rockefeller Branch; The Rockefeller University; New York NY USA
8. Department of Medical Microbiology; Capital Medical University; Beijing China