Carrol E D, Latif A H, Misbah S A, Flood T J, Abinun M, Clark J E, Pugh R E, Cant A J
Department of Paediatric Infectious Diseases and Immunology, Newcastle General Hospital, Newcastle upon Tyne NE4 6BE.
BMJ. 2001 Sep 1;323(7311):501-3. doi: 10.1136/bmj.323.7311.501.