Parkinson's disease CA2-CA3 hippocampal atrophy is accompanied by increased cholinergic innervation in patients with normal cognition but not in patients with mild cognitive impairment. - Legault-Denis, Camille; Aumont, Étienne; Onuska, Kate M.; Schmitz, Taylor W.; Bussy, Aurélie; Chakravarty, Mallar; Soucy, Jean-Paul; Bédard, Marc-André (Brain Imaging & Behavior, 2024)