1. Department of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
2. Karolinska Institutet, Karolinska University Hospital, SE-117 77 Stockholm, Sweden
3. Department of Surgery (Otolaryngology), Yale School of Medicine, New Haven, CT 06519, USA
4. Department of Life Sciences, School of Sciences, European University Cyprus, 1516 Nicosia, Cyprus
5. Department of Ophthalmology, Royal Cornwall Hospitals NHS Trust, TR1 3LQ Cornwall, UK
6. Neonatal Unit, Division for Women and Children's Health, Noble's Hospital, IM4 4RJ Douglas, Isle of Man, British Isles
7. First Department of Paediatrics, ‘Aghia Sophia’ Children's Hospital, University of Athens School of Medicine, 115 27 Athens, Greece