Normal-subtracted preprocessing of Raman spectra aiming to discriminate skin actinic keratosis and neoplasias from benign lesions and normal skin tissues - Silveira Junior, Landulfo; Pasqualucci, Carlos Augusto; Bodanese, Benito; Pacheco, Marcos Tadeu Tavares; Zangaro, Renato Amaro (Lasers in medical science, 2020)