NITIKA, N.; MISHRA, S. S.; LOHANI, P. Lexis Expansion: a prerequisite for analyzing time changing variables in a cohort study. Nepal Journal of Epidemiology, [S. l.], v. 7, n. 2, p. 681–684, 2017. DOI: 10.3126/nje.v7i2.17974. Disponível em: https://www.nepjol.info/index.php/NJE/article/view/17974. Acesso em: 27 apr. 2024.