Suppose it were a genetic disorder.
Krugman
R D
RD
D000818:Animals; D002648:Child; D002649:Child Abuse / Q000145:classification*; D016762:Genes, fos / Q000235:genetics; D030342:Genetic Diseases, Inborn; D006801:Humans; D008425:Maternal Behavior / Q000502:physiology; D051379:Mice; D018345:Mice, Knockout