Citation Index

1. Chromosomal Abnormalities.The Merck Manual of Diagnosis and Therapy. 1995-2001.      Merck and Company, Inc. Whitehouse Station, NJ, USA.  September 5, 2001.      <http://www.merck.com/pubs/mmanual/section19/chapter261/261l.htm> 2. "Edward's Syndrome". The CaF Directory Online. Young, I. May 1994. 5 September 2001.      <http://www.cafamily.org.uk/Direct/e18.html> 3.  Carey, John.  "Trisomy 18 Facts".Support Organization for Trisomny 18,13, and other Related      Disorders.  6 Sept. 2001.      <http://www.trisomy.org/html/trisomy_18_facts.htm> 4. "Genetics Diseases". DIANON Systems, Inc. 2001. 6 Sept. 2001.       <http://www.dianon.com/genetic.htm> 5.  The Chromosome 18 Register and Research Society. 6Sept.2001.      <http://www.chromosome18.org> 6.  "Prenatal Screening for Neural Tube Defects and Down Syndrome". Greenwood Genetic       Center. May 2001. 7Sept.2001 <http://www.ggc.org/prenat.html> 7. Epstein, C. J. and National Down Syndrome Society (U.S.) (1993). The Phenotypic mapping of         down syndrome and other aneuploid conditions : proceedings of a National Down Syndome     Society conference held in New York, January 14 and 15, 1993. New York, Wiley-Liss 8. Scherz, R. G. (1966). "Pathologic variations of the 17-18 trisomy." Medical Annals of the District of     Columbia 35(4): 195-200 passim.