Association of dopamine depletion and cholinergic basal forebrain atrophy with brain metabolism and cognition in Parkinson's disease. - Hyun Lee, Jung; Park, Mina; Ahn, Sung Jun; Lee, Jae Hoon; Ryu, Young Hoon; Yoo, Han Soo; Lyoo, Chul Hyoung (Journal of Parkinson's Disease, 2026)