Levels of glial cell line-derived neurotrophic factor are decreased, but fibroblast growth factor 2 and cerebral dopamine neurotrophic factor are increased in the hippocampus in Parkinson's disease. - Virachit S; Mathews KJ; Cottam V; Werry E; Galli E; Rappou E; Lindholm P; Saarma M; Halliday GM; Shannon Weickert C; Double KL (Brain pathology (Zurich, Switzerland), 2019)