Selvais, P., Hermans, M., Donckier, J., & Buysschaert, M. (1997). Reported rates, incentives, and effectiveness of major vaccinations in 501 attendees at two diabetes clinics. Diabetes Care, 20(7), 1212-1213. https://doi.org/10.2337/diacare.20.7.1212 (Original work published 1997)