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American Journal of Medical Genetics|January 31, 1998
Body wall defects in two sibsA T Helderman-van den Enden, M M Bartelings, I L van Kamp, et al.Journal of Medical Genetics|April 16, 1999
Monozygotic twin brothers with the fragile X syndrome: different CGG repeats and different mental capacitiesA T Helderman-van den Enden, P D Maaswinkel-Mooij, E Hoogendoorn, et al.Prenatal Diagnosis|August 26, 1998
A near false-negative finding of mosaic trisomy 21--a cautionary taleG C Beverstock, K Hansson, A T Helderman-van den Enden, et al.Pageof 1