SNCA and Parkinson disease: Our IHC analysis for p-ASyn (S129) showed varying degrees of Lewy body inclusions (PD-1 and PD-2, Fig. 2b; PD-3 and PD-6, Additional file 1: Figure S7b) and Lewy neurites pathology (PD-1 and PD-2, Fig. 2b; PD-6, Additional file 1: Figure S7b), with pronounced involvement of hippocampal CA2 field in most PD cases (Fig. 2a-b and Additional file 1: Figure S7a-b).