Vianna-Morgante A M, Richieri-Costa A, Rosenberg C
Clin Genet. 1987 Jun;31(6):406-9. doi: 10.1111/j.1399-0004.1987.tb02833.x.
A de novo deletion of the short arm of chromosome 20--del (20) (p11) or (p11p13)--is described in a child with psychomotor retardation and multiple congenital anomalies.