1. Fluid-filled pterygium colli (XO Turner's syndrome);Sunderland, W.A.;Am J Dis Child,1970
2. Acetylcholinesterase and fetal malformations: modified qualitative technique for diagnosis of neural tube defects;Haddow, J.E.; Morin, M.E.; Holman, M.S.; Miller, W.A.;Clin Chem,1981
3. Amniotic fluid acetylcholinesterase electrophoresis as a secondary test in the diagnosis of anencephaly and open spina bifida in early pregnancy. Report of the Collaborative Acetylcholinesterase Study;Wald, N.J.; Cuckle, H.S.;Lancet,1981
4. False positive gel-acetylcholinesterase results in blood-stained amniotic fluids;Barlow, R.D.; Cuckle, H.S.; Wald, N.J.;Br J Obstet Gynaecol,1982