Comment on

• Direct diagnosis by DNA analysis of the fragile X syndrome of mental retardation.

  Rousseau F, Heitz D, Biancalana V, Blumenfeld S, Kretz C, Boué J, Tommerup N, Van Der Hagen C, DeLozier-Blanchet C, Croquette MF, et al. Rousseau F, et al. N Engl J Med. 1991 Dec 12;325(24):1673-81. doi: 10.1056/NEJM199112123252401. N Engl J Med. 1991. PMID: 1944467
• Prenatal diagnosis of fragile X syndrome by direct detection of the unstable DNA sequence.

  Sutherland GR, Gedeon A, Kornman L, Donnelly A, Byard RW, Mulley JC, Kremer E, Lynch M, Pritchard M, Yu S, et al. Sutherland GR, et al. N Engl J Med. 1991 Dec 12;325(24):1720-2. doi: 10.1056/NEJM199112123252407. N Engl J Med. 1991. PMID: 1944473 No abstract available.