deletions | additions       diff --git a/introduction.md b/introduction.md  index e03bca5..2e2fd70 100644  --- a/introduction.md  +++ b/introduction.md 
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* Redmine https://ebi-forecast.igb.illinois.edu/redmine/account/register   * BETYdb https://www.betydb.org/signup   * GitHub https://github.com/   * Mendeley www.mendeley.com/