If the 1st test failed, supplier is required to pay the re-test cost and submit another qualified sample ASAP.

假如第一测试失败，供给商必需支付重新测试本钱，尽快提交另一份合格的样品。

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Dr Brennan, who was the clinical director of the service from October 1990 until he took paid leave in June 1997, failed to carry out a key test on dozens of women which involves taking a sample of cells from the suspected cancer with a fine needle, the GMC was told.

BBC: Doctors 'failed breast cancer patients'