New Genetic Form of Alzheimer's Identified in People With Common Risk Factor ScienceAlertAPOE4 homozygozity represents a distinct genetic form of Alzheimer’s disease Nature.comStudy Suggests Genetics as a Cause, Not Just a Risk, for Some Alzheimer's The New York TimesGenes known to increase the risk of Alzheimer’s may actually be an inherited form of the disorder, researchers say CNNAlzheimer's risk gene APOE4 may cause a distinct form of the disease, study suggests STAT