Age-related acceptability of vaginal self-sampling in cervical cancer screening at two university hospitals: a pilot cross-sectional study - Lorenz, Noely Paula Cristina; Termini, Lara; Longatto Filho, Adhemar; Tacla, Maricy Alves Barbosa; Aguiar, Lana Maria de; Beldi, Mariana Carmezim; Ferreira Filho, Edson Santos; Baracat, Edmund Chada; Soares Júnior, José Maria (Bmc public health, 2019)