Frequency of holoprosencephaly in the International Clearinghouse Birth Defects Surveillance Systems: Searching for population variations (pages 585–591)Emanuele Leoncini, Giovanni Baranello, Iêda M. Orioli, Göran Annerén, Marian Bakker, Fabrizio Bianchi, Carol Bower, Mark A. Canfield, Eduardo E. Castilla, Guido Cocchi, Adolfo Correa, Catherine De Vigan, Berenice Doray, Marcia L. Feldkamp, Miriam Gatt, Lorentz M. Irgens, R. Brian Lowry, Alice Maraschini, Robert Mc Donnell, Margery Morgan, Osvaldo Mutchinick, Simone Poetzsch, Merilyn Riley, Annukka Ritvanen, Elisabeth Robert Gnansia, Gioacchino Scarano, Antonin Sipek, Romano Tenconi and Pierpaolo Mastroiacovo
Article first published online: 19 JUN 2008 | DOI: 10.1002/bdra.20479