Quest Diagnostics 2005 Annual Report Download - page 79

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(iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or
disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that
controls may become inadequate because of changes in conditions, or that the degree of compliance with the
policies or procedures may deteriorate.
As described in the Report of Management On Internal Control Over Financial Reporting, management has
excluded LabOne, Inc. from its assessment of internal control over financial reporting as of December 31, 2005
because it was acquired by the Company in a purchase business combination during 2005. We have also
excluded LabOne, Inc. from our audit of internal control over financial reporting. LabOne, Inc. is a wholly-
owned subsidiary whose total assets and total revenues represent 3.3% and 1.6%, respectively, of the related
consolidated financial statement amounts as of and for the year ended December 31, 2005.
/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Florham Park, New Jersey
February 28, 2006
F-2