Prenatal Visualization of Cebocephaly with a Prominent Nose in a Second-trimester Fetus with Alobar Holoprosencephaly and Trisomy 13 - Chih-Ping Chen; Jin-Chung Shih; Chin-Yuan Tzen; Schu-Rern Chern; Chen-Ju Lin; Wayseen Wang (Elsevier, 2008)