Functional brain imaging of negative symptoms in schizophrenia: further evidence of prefrontal dysfunction Paola Fuentes-Claramonte; Ana Aquino-Servín; María Ángeles Garcia-León; Jordi Ortiz-Gil; Pilar Salgado-Pineda; Amalia Guerrero-Pedraza; Salvador Sarró; Emilio J. Inarejos-Clemente; Raymond Salvador; Peter J. McKenna; Edith Pomarol-Clotet;