1. Virology, Ninewells Hospital, Dundee, formerly of the Regional Virus Laboratory, Glasgow, Scotland
2. Departments of Perinatal and Paediatric Pathology, Ninewells Hospital, Dundee, formerly of the Regional Virus Laboratory, Glasgow, Scotland
3. Royal Hospital for Sick Children, Glasgow, and the Virology Unit††, Ninewells Hospital, Dundee, formerly of the Regional Virus Laboratory, Glasgow, Scotland