1. Laboratory of Clinical Biochemistry – Molecular Diagnostics, Second Department of Pediatrics, Athens University Medical School, “P & A Kyriakou” Children’s Hospital, Athens, Attica, Greece,
2. Department of Allergy, 2nd Pediatric Clinic, Athens University Medical School, “P & A Kyriakou” Children’s Hospital, Athens, Attica, Greece,
3. Department of Pediatrics, Democritus University of Thrace, Alexandroupolis, Evros, Greece, and
4. Department of Clinical Microbiology, “P & A Kyriakou” Children's Hospital, Athens, Attica, Greece