. Author manuscript; available in PMC: 2019 Nov 6.
Published in final edited form as: Expert Rev Anticancer Ther. 2019 Jun 20;19(7):569–587. doi: 10.1080/14737140.2019.1615889
This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.
Figure 4.
Timeline of the principal CDK4/6 inhibitors clinical trials.