A smart classifier of orthoses, prostheses and special materials (OPMEs) in invoices - Gomes, Wesckley; Colaço Júnior, Methanias; Alves, Luca Pareja Credidio Freire; Fontes, Raphael; Silva, Rodrigo; Nunes, Bruno; Silva, Caldeira; Valentim, Ricardo (Frontiers in the Internet of Things, 2025)