RT Journal Article SR Electronic T1 Mapping of a de novo unequal crossover causing a deletion of the steroid 21-hydroxylase (CYP21A2) gene and a non-functional hybrid tenascin-X (TNXB) gene JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP e53 OP e53 DO 10.1136/jmg.40.5.e53 VO 40 IS 5 A1 Koppens, P F J A1 Smeets, H J M A1 de Wijs, I J A1 Degenhart, H J YR 2003 UL http://jmg.bmj.com/content/40/5/e53.abstract AB