YOUNG, J. Mail surveys of general practice physicians: response rates and non-response bias. Swiss Medical Weekly, [S. l.], v. 135, n. 1314, p. 187–188, 2005. DOI: 10.4414/smw.2005.11031. Disponível em: https://smw.ch/index.php/smw/article/view/482. Acesso em: 2 may. 2024.