P1‐163: DIFFERENTIAL SIALYLATION OF SERPIN A1, DETECTED BY NANOSCALE CAPILLARY ISOELECTRIC FOCUSING IN CEREBROSPINAL FLUID, AS AN EARLY DIAGNOSTIC MARKER OF PARKINSON's DISEASE DEMENTIA. (1st July 2014) - Halbgebauer, Steffen; Klafki, Hans‐Wolfgang; Nagl, Magdalena; Haussmann, Ute; Jesse, Sarah; Lehnert, Stefan; Soininen, Hilkka; Herukka, Sanna‐Kaisa; Steinacker, Petra; Wiltfang, Jens; Otto, Markus