Der Kaloustian V M, Masri R, Khudr A, Talj F, Libbus B, Nabulsi M, Khouri F P
Hum Genet. 1987 Jan;75(1):97. doi: 10.1007/BF00273853.
This is the first report in the literature of siblings affected with Down syndrome; one sibling had a nondisjunction of chromosome 21 and the other a (21q;21q) translocation.