I would like to mention something about anonymity in sending survey invite. Do you have any examples I could use?
These are samples of statements we have used in the past:
You have been selected as one of xyz to complete this survey. Participating in this survey is completely voluntary and zsx anticipates very few risks from your participation. There is a small chance that you will feel uncomfortable with a question and not want to respond. Please remember that you do not have to answer any questions that you do not want to answer. Project staff will not share personal information from your survey responses with anyone outside this project. We will take every precaution to ensure your privacy. Participation in this survey will not affect your status with zsx. The survey takes about 20 minutes to complete.
Thank you for your continued participation in the ddd Survey. Your responses will help us to improve rtm and cvb in your community and across the country. Please remember that your participation is voluntary. Personal information about you will not be shared with anyone outside of this project and your name will not be tied to your survey responses in any way.