title: Lumpers and splitters: who knows? Who cares?
authors.forename: Bennett L
authors.initials: BL
authors.lastname: Leventhal
mesh_terms: D002659:Child Development Disorders, Pervasive / Q000145:classification* / Q000175:diagnosis*; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D008297:Male; D012042:Registries