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Ambrozej D
Makrinioti H
Ruszczynski M
Elenius V
Konradsen JR
Hedlin G
Schwarze J
Papadopoulos N
Jartti T
Feleszko W
Department of Pediatric Respiratory Diseases and Allergy, Medical University of Warsaw, Warsaw, Poland
Imperial College, London, United Kingdom
Department of Family Medicine, Medical University of Warsaw, Warsaw, Poland
Department of Pediatrics, Turku University and University Hospital, Turku, Finland
Astrid Lindgren Childrens Hospital Q2:08, Karolinska University Hospital, Stockholm, Sweden
Department of Women's and Children's Health Karolinska Institutet, Stockholm, Sweden.
Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
MRC Centre for Reproductive Health, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
Allergy Department, 2nd Pediatric Clinic, University of Athens, Athens, Greece
Division of Infection, Inflammation and Respiratory Medicine, University of Manchester, Manchester, United Kingdom,
Poland
United Kingdom
Finland
Sweden
Greece
N/A
N/A
N/A
N/A
N/A
N/A
Randomized
Controlled
NA
N/A
N/A
N/A