Prevalence of non-obstructive dysphagia in patients with heartburn and regurgitation - Batista, Andrea de Oliveira; Nascimento, Weslania Viviane do; Cassiani, Rachel de Aguiar; Silva, Ana Cristina Viana da; Alves, Leda Maria Tavares; Alves, Dauana Cássia; Dantas, Roberto Oliveira (Clinics, 2020)