Table 1 Text for email blast communication with regular users

The University of Melbourne in conjunction with GC, the dental company which manufacturers GC Tooth Mousse Plus^®, would like to know about your experience of using GC Tooth Mousse Plus^®. In brief, you will be asked why you were prescribed this product, what difference did this product makes to your teeth/your mouth, and for any suggestions you might have for the manufacturer of this product

If you are a regular user of GC Tooth Mousse Plus^® and are happy to share your opinion, you are invited to be part of a research project called “Experiences of oral health and disease, before and after GC Tooth Mousse Plus^®”. This research is being conducted by the Melbourne Dental School at The University of Melbourne

Participation in this research project is voluntary and you have the right to withdraw at any time, you may also withdraw any data you have supplied. You will not be identified in any publication arising from the research. You will be informed about any publications arising from this research

If you are a regular user of GC Tooth Mousse Plus^® and are happy to share your opinions by participating in this research, all you will need to do is to send a SMS to Dr Alexandra Sbaraini on [mobile number] * or send an email to [research email] *. Dr Sbaraini will explain the research and collect your feedback on the product

Free tube of GC Tooth Mousse Plus^®

As a "thank you" for your participation, GC will provide you free tube of GC Tooth Mousse Plus^®. This offer is limited to the first 50 people who contact Dr Sbaraini and it will run for 7 days from [date] to [date]