If you needed more reasons to be wary of Elsevier, here's what kind of data they collect about you. For example: whenever you do anything within Mendeley.
https://eiko-fried.com/welcome-to-hotel-elsevier-you-can-check-out-any-time-you-like-not/
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Reminder: Zotero is free, open-source and not owned by a giant company which sells your data.
