The article [Bayesian approach to investigate a two-state mixed model of COPD exacerbations], written by [Anna Largajolli, Misba Beerahee, Shuying Yang], was originally published electronically on the publisher’s internet portal (currently SpringerLink) on [13 June 2019] without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on [November 2019] to © The Author(s) [2019] and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

[Anna Largajolli，Misba Beerahee，Yang Shuying Yang]撰写的文章[贝叶斯方法研究COPD恶化的两态混合模型]最初以电子方式发布在发布者的互联网门户（现为SpringerLink）上，于[2019年6月13日]没有开放的访问权限。随着作者决定选择“开放选择”，该文章的版权于[2019年11月]更改为©作者[2019]，该文章随即随知识共享署名4.0国际的条款分发。许可（http://creativecommons.org/licenses/by/4.0/），只要您对原始作者和源，提供指向知识共享许可的链接，并指出是否进行了更改。