1. Time trends in reported prevalence of kidney stones in the United States: 1976–1994;Stamatelou;Kidney International,2003
2. ACR. Acute Onset Flank Pain – Suspicion of Stone Disease. American College of Radiology; 1995 [updated 2011]; Available from: http://www.acr.org.
3. World Medical Association of Helsinki, ethical principles for medical research involvin human subjects;Association;Bulletin of the World Health Organization,2001
4. Nephrocalcinosis: re-defined in the era of endourology;Miller;Urological Research,2010
5. Statistical methods for rates and proportions;Fleiss,1985