Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-32694-7, published online 26 September 2018

In the original HTML version of this Article, H. M. Ogmundsdottir was incorrectly listed as one of the corresponding authors. The correct corresponding authors for this Article are M. H. Ogmundsdottir and E. Steingrimsson. Correspondence and request for materials should be addressed to mho@hi.is or eirikurs@hi.is. This error has now been corrected in the HTML version of the Article; the PDF version was correct from the time of publication.