Journal of Pharmaceutical Negative Results ¦ Volume 13 ¦ Special Issue 6 ¦ 2022 1104 Affordability of orthodontic treatment: a step towards the economic evaluation. Journal of Pharmaceutical Negative Results, [S. l.], p. 1104–1109, 2022. DOI: 10.47750/pnr.2022.13.S06.148. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/1894.. Acesso em: 17 jun. 2026.