1 University of Gothenburg Vaccine Research Institute (GUVAX), Department of Microbiology and Immunology, The Sahlgrenska Academy of University of Gothenburg, Gothenburg S-40530, Sweden
2 Department of Pediatrics, Hillel Yaffe Medical Center, Hadera, Israel
3 Department of Pediatrics, Laniado Medical Center, Natanya, Israel
4 Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel
5 Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM). 3er piso Edificio de Investigación, Circuito interior s/n Ciudad Universitaria, Coyoacán, Mexico
6 Central Laboratories, Ministry of Health, Jerusalem, Israel
7 Pediatric Infectious Disease Unit, Carmel Medical Center, Haifa; and Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel