Correction to: Endocrine

https://doi.org/10.1007/s12020-021-02744-8

The article Tumor volume improves preoperative differentiation of prolactinomas and nonfunctioning pituitary adenomas, written by Kyla Wright, Matthew Lee, Natalie Escobar, Donato Pacione, Matthew Young, Girish Fatterpekar and Nidhi Agrawal, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on May 08, 2021 with open access. With This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply 2021 decision to step back from Open Choice, the copyright of the article was changed on August 2020 to © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2021 and the article is forthwith distributed under the terms of copyright.