It is indicated that the products are not returning for evaluation.Since the products associated with the complaint were not returned, a review of in-house testing was performed.A review of retain strip testing for lot# 334580 found the results met both accuracy and repeatability criteria.The products performed as expected and no product deficiencies were observed.The manufacturing records for lot# 334580 were reviewed.The lot met specifications and no non-conformances were documented.The customer reported the use of strip lot 334580 which expired in 2015/03.Using expired product may be a cause for the unexpected results experienced by the customer.Based on the information available, there is no indication of a product deficiency.No corrective action is required at this time.
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