RT Journal Article SR Electronic T1 Prenatal diagnosis and genetic counselling JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 150 OP 155 DO 10.1136/jcp.27.Suppl_8.150 VO 27 IS Suppl 8 A1 D. J. H. Brock YR 1974 UL http://jcp.bmj.com/content/27/Suppl_8/150.abstract AB