1. Department of Histopathology, Children's University Hospital, Temple Street, Dublin 1, Ireland
2. National Virus Reference Laboratory, University College Dublin, Belfield, Dublin 4, Ireland
3. Centre for Research in Infectious Diseases, University College Dublin, Belfield, Dublin 4, Ireland
4. Center for Infection and Immunity, Mailman School of Public Health, Columbia University, New York, New York
5. Department of Histopathology, Beaumont Hospital and Royal College of Surgeons, Dublin, Ireland
6. National Maternity Hospital, Holles Street, Dublin 2, Ireland