Editorial comment.

摘要

In 2000 the expenditure on urolithiasis in the US was estimated at Dollars 2.1 billion, which imposes a significant burden on the health care system. The authors evaluated a selected population of children with ICD codes related to urinary stones who required admission to pediatric hospitals in the US. They collected data from the PHIS database and analyzed some clinical/epidemiological features as well as the economical burden resulting from these hospitalizations.