Abstract

Following the publication of this article, the authors discovered that the Acknowledgments section was incomplete. The revised Acknowledgments section should read:
‘This study was supported in part by the Else-Kröner-Fresenius-Stiftung, Bad Homburg, Germany and in part by the Pitzer Foundation, Bad Nauheim, Germany. The nano-CT is supported in part by the German Research Foundation (DFG; 162/291-1 FUGG).’
