title: Dual identities.
authors: Helen
authors: H
authors: Pearson
mesh_terms: D000544:Alzheimer Disease / Q000235:genetics; D001321:Autistic Disorder / Q000235:genetics / Q000473:pathology; D001327:Autoimmune Diseases / Q000209:etiology / Q000473:pathology; D001803:Blood Transfusion; D002459:Cell Fusion; D002678:Chimera / Q000002:abnormalities* / Q000097:blood / Q000235:genetics*; D002891:Chromosomes, Human, Pair 21 / Q000235:genetics; D012734:Disorders of Sex Development / Q000235:genetics; D005260:Female; D005307:Fertilization in Vitro / Q000009:adverse effects; D006801:Humans; D008297:Male; D008431:Maternal-Fetal Exchange; D009030:Mosaicism / Q000235:genetics* / Q000473:pathology; D009154:Mutation; D009679:Nuclear Family; D020411:Oligonucleotide Array Sequence Analysis; D010312:Parthenogenesis / Q000235:genetics; D010920:Placenta / Q000378:metabolism / Q000473:pathology; D011247:Pregnancy; D016715:Proteus Syndrome / Q000235:genetics; D014314:Trisomy / Q000235:genetics; D014429:Twins, Dizygotic / Q000235:genetics