Correction to: Invest New Drugs (2021) 39:1357–1365 https://doi.org/10.1007/s10637-021-01119-0.

The article Selinexor in combination with topotecan in patients with advanced or metastatic solid tumors: Results of an open-label, single-center, multi-arm phase Ib study was originally published electronically on the publisher’s internet portal on 28 April 2021 without open access. After publication in volume [39], issue [5], pages [1357–1365] the author decided to opt for Open Choice and to make the article an Open Access publication. Therefore, the copyright of the article has been changed to © The Author(s) 2021 and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/), which permits use, sharing, 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 licence, and indicate if changes were made.

The original article has been corrected.