Affiliation: | 1. Regional Infectious Diseases Unit, Fazakerley Hospital, Liverpool U.K.;2. Aintree Chest Centre, Fazakerley Hospital, Liverpool U.K.;3. Public Health Laboratory Service, Fazakerley Hospital, Liverpool U.K.;4. Central Public Health Laboratory, Virus Reference Division, London, U.K.;1. Department of Obstetrics and Gynecology, Cornell University Medical College, New York, N. Y., USA;2. New York Hospital, New York, N. Y., USA |