Nucleic Acids Research,2019, gkz1110, https://doi.org/10.1093/nar/gkz1110
The authors had not realized that the Github enterprise server (https://github.umn.edu/schmidt-lab/SPINE) was inaccessible to users outside their institution. The repository has been moved to the public Github: https://github.com/schmidt-lab/SPINE.
These corrections do not affect the results or conclusion of the article.
The published article has been updated.
