How can I record multiple sessions for a single subject?

How can I record multiple sessions each session with a few different parameters for a single person?
Each session will have the same questions (For example seizure threshold, duration of seizure, amount of drugs given etc.) . But the answers for these question will vary from session to session.
Each subject will have about 15-20 such sessions.

Please look at BRANCH(es) →

In our example, ONE person has MANY family members.

In your case, ONE person has MANY sessions