# Copyrights and permissions for ccwr

## Package source code

Copyright (c) 2026 Sang Ho Park.

The package source code is licensed under the MIT License. See LICENSE.

## Article-derived example data

The `lungcancer` and `patients13` datasets are derived from the illustrative
example data in:

Maringe C, Benitez Majano S, Exarchakou A, Smith M, Rachet B, Belot A, and
Leyrat C (2020). "Reflection on modern methods: trial emulation in the
presence of immortal-time bias. Assessing the benefit of major surgery for
elderly lung cancer patients using observational data." *International Journal
of Epidemiology*, 49(5), 1719-1729. doi:10.1093/ije/dyaa057.

The article's author(s) hold the copyright to the article material, published
by Oxford University Press on behalf of the International Epidemiological
Association.