Please answer as honestly and as fully as you can, but don't let any single difficult question stop you from submitting. If you find a question unclear, upsetting, or simply don't know the answer, it's fine to leave it blank or move on. A partially completed questionnaire is still genuinely useful. Please submit whatever you're able to.
Self-report forms: complete these yourself
Informant forms: to be completed by a family member or close contact