Serum levels of soluble TNF-α receptors but not BDNF are associated with apathy symptoms in mild Alzheimer's disease and amnestic mild cognitive impairment

by Henrique Cerqueira Guimarães, Paulo Caramelli, Patricia Paes Araujo Fialho, Elisa de Paula França, Marcelo Pelizzaro Dias Afonso, Antonio Lucio Teixeira