Increased baseline occupancy of D2 receptors by dopamine in schizophrenia - Abi-Dargham, A; Rodenhiser, J; Printz, D; Zea-Ponce, Y; Gil, R; Kegeles, LS; Weiss, R; Cooper, TB; Mann, JJ; Van Heertum, RL; Gorman, JM; Laruelle, M (Proc Natl Acad Sci US A, 2000)