RT Journal Article SR Electronic T1 Alphafetoprotein and neural tube defects JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 157 OP 164 DO 10.1136/jcp.29.Suppl_10.157 VO 29 IS Suppl 10 A1 Brock, D. J. H. YR 1976 UL http://jcp.bmj.com/content/29/Suppl_10/157.abstract AB