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Quality assurance (QA) visits are carried out by the Public Health England screening quality assurance service (SQAS).
The evidence for this report comes from:
routine monitoring data collected by the NHS screening programmes
data and reports from external organisations
evidence submitted by the provider(s), commissioner and external organisations
information collected during a pre-review visit to North West London Child Health Services, Health Intelligence on 7 November 2017
information shared with the London regional SQAS as part of the visit process