Automatic Detection of Negated Findings in Radiological Reports for Spanish Language: Methodology Based on Lexicon-Grammatical Information Processing. - Walter Koza; Darío Filippo; Viviana Cotik; Vanesa Stricker; Mirian Muñoz; Ninoska Godoy; Natalia Rivas; Ricardo Martínez-Gamboa (J. Digit. Imaging, 2019)