You may thus be asked to participate in another study, or may have already been asked. Definitely yes . All the information you provide is entirely confidential to the study team and will not be passed on to anyone else. The MoD will not have access to any data you provide. The study team has considerable experience conducting medical surveys which require confidential data to be held securely.
Participation is entirely voluntary.
However, for the results to be meaningful we need all those contacted to reply. We hope you will all feel able to take part, and look forward to hearing from you.