1. Ring 21 chromosome: the mild end of the phenotypic spectrum;Gardner, R.J.M.; Monk, N.A.; Clarkson, J.E.; Allen, G.J.;Clin Genet,1986
2. Four new cases of ring 21 and 22 including familial transmission of ring 21;Palmer, C.G.; Hodes, M.E.; Reed, T.; Kojetin, J.;J Med Genet,1977
3. Acute megakaryoblastic leukaemia associated with intrinsic platelet dysfunction and constitutional ring 21 chromosome in a young boy;Pui, C.H.; Williams, D.L.; Scarborough, V.; Jackson, C.W.; Price, R.; Murphy, S.;Br J Haematol,1982
4. Ring chromosome 21 in phenotypically apparently normal persons: report of two families from Switzerland and Italy;Schmid, W.; Tenconi, R.; Baccichetti, C.; Caufin, D.; Schinzel, A.;Am J Med Genet,1983
5. Length polymorphism in the pro a2(I) collagen gene: an alternative explanation in a case of Marfan syndrome;Dalglcish, R.; Williams, G.; Hawkins, JR;Hum Genet,1986