O5‐04‐01: A RARE GENETIC VARIANT IN THE PLCG2 GENE IS ASSOCIATED WITH A REDUCED RISK OF ALL MAJOR TYPES OF DEMENTIA AND AN INCREASED RISK TO REACH AN EXTREMELY OLD AGE. (1st July 2006) - Van der Lee, Sven J.; Jansen, Iris E.; Pletnikova, Olga; Blauwendraat, Cornelis; Hulsman, Marc; Dalmasso, Maria Carolina; Kawalia, Amit; Ramirez, Alfredo; Van der Flier, Wiesje M.; Scheltens, Philip; Reinders, Marcel JT.; Hernandez, Isabel; et al.