Paragraph 4

The processing of confidential patient information for medical purposes from more than one source with a view to—

(a)

linking information from more than one of those sources;

(b)

validating the quality or completeness of—

(i)

confidential patient information, or

(ii)

data derived from such information;

(c)

avoiding the impairment of the quality of data derived from confidential patient information by incorrect linkage or the unintentional inclusion of the same information more than once.