How can I check whether the database contains enough subjects for my reasearch project?

When you setup filters for a study you can see the number of potential matches in the database. In order to do that you first need to create a study. It is not a problem if you do not yet know the details of the study. Anything you enter can still be changed later. You can also delete this study and create a fresh one once you are ready.

How can I contact subjects by pseudonym after the study is finished?

Finding subjects by pseudonym is no longer possible once the study has finished. If you need to contact a subject after the study is finished we recommend to resume the study temporarily.