Hogg W et al. - The results of our study provide reason to be optimistic, as they suggest that sustainability of outreach facilitation beyond the end of an intervention is feasible in the volatile environment of a busy primary care practice. Also important, we were able to show improvements in delivery of preventive services despite the already high baseline proportions of patients appropriately serviced. More longitudinal research, with randomized controlled designs, should be conducted to support the validity and long-term efficiency of the outreach facilitation implementation. A follow-up study of our clinics would be desirable to explore the lifespan of the observed improvements.