ST JOHN, P. D.; HOGAN , D. B. Frailty of Health Care Systems. Canadian Geriatrics Journal, Markham, Canada, v. 28, n. 4, p. 396–399, 2025. DOI: 10.5770/cgj.28.889. Disponível em: https://cgjonline.ca/index.php/cgj/article/view/889. Acesso em: 27 apr. 2026.