1. Pham Ngoc Thach Hospital, Ho Chi Minh City, Vietnam.
2. School of Public Health, Université Libre de Bruxelles - ULB, Brussels, Belgium.
3. Department of Paediatrics, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam.
4. Clinic of Immuno-allergology, CHU Brugmann - ULB, Brussels, Belgium.
5. Laboratory of Immunology, Université Libre de Bruxelles - ULB, Brussels, Belgium.