Common variants at MS4A4/MS4A6E, CD2uAP, CD33, and EPHA1 are associated with late-onset Alzheimer’s disease Naj AC, Jun G, Beecham GW, Wang L-S, Narayan B, Green RC, Pericak-Vance MA, Farrer LA, Schellenberg GD. Nature Genetics April 2011 Open .pdf