We are carrying out a study involving participants being emailed a survey link. They will carry out a couple of questions before they will be asked to attend an in-person session. Following the in-person session, the participant will be asked to complete some more online questions. Is it possible for the participant to carry out the initial online questions, and then only have access to the second part of questions at a later date (i.e., after the in-person session), or would this be a case of creating multiple surveys?