The three categories of C-QuIPS memberships are Core, Affiliate and General membership. These categories do not reflect the level of a person’s expertise or interest in either patient safety or health care quality. Rather, they reflect the level of involvement an individual has in activities led by the Centre. Numerous individuals within the UofT community have expertise in, for instance, epidemiology. But only some of them have appointments in the School of Public Health. And, among those who do, some have adjunct appointments while others are core faculty members. Similarly, many individuals in the UofT community have expertise, advanced training, or interests in patient safety and health care quality. But, we have to distinguish those who are directly involved in activities carried out by the Centre from those have had more occasional involvement and from others who just want to be kept in the loop about Centre events.