Retraction of: Eric F. Glassy and David J. Blomberg. July 2015. External Quality Assessment Programs in the US with an emphasis on urinary sediment testing: the College of American Pathologists experience. Clin Chem Lab Med 2015 Aug 11 DOI https://doi.org/10.1515/cclm-2015-0658 [Epub ahead of print].
The retraction has become necessary because the article, which was published online first, could not be approved for final publication in the Special Supplemental Issue on Urinary sediment: still an important diagnostic tool.
The editors and the publisher sincerely regret the situation and wish to apologize for any inconvenience that may have been caused.