Sign Language Recognition System for Deaf Patients: Protocol for a Systematic Review - Milena Soriano Marcolino; Lucca Fagundes Ramos Oliveira; Lucas Rocha Valle; Luiza Marinho Motta Santa Rosa; Zilma Silveira Nogueira Reis; Thiago Barbabela de Castro Soares; Elidéa Lúcia Almeida Bernardino; Raniere Alislan Almeida Cordeiro; Raquel Oliveira Prates; Mario Fernando Montenegro Campos (JMIR Research Protocols)