1. United Nations World Population Prospects Report 2005–2010.
2. International Database. Table 094. Mid-year Population, by Age and Sex;US Census Bureau,2005
3. Heterogeneity of glomerular size in normal donor kidneys: impact of race;Abdi;American Journal of Kidney Diseases: The Official Journal of the National Kidney Foundation,1998
4. Aging-associated changes in renal extracellular matrix;Abrass;American Journal of Pathology,1995
5. Effect of acute acid loading on urinary acid excretion by the aging human kidney;Adler;Journal of Laboratory and Clinical Medicine,1968