NYBERG , Karl; HEDMAN , Peter. Swedish guidelines for registry-based randomized clinical trials. Upsala Journal of Medical Sciences, [S. l.], v. 124, n. 1, p. 33–36, 2019. DOI: 10.1080/03009734.2018.1550453. Disponível em: https://ujms.net/index.php/ujms/article/view/5763. Acesso em: 12 nov. 2026.