The three categories of CQuIPS memberships are core, affiliate and general. These categories do not reflect the level of a person’s expertise or interest in either quality improvement or patient safety. Rather, they reflect the level of involvement an individual has in activities led by the Centre. Numerous individuals within the University of Toronto 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 University community have expertise, advanced training or interests in quality improvement and patient safety. However, 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.