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Variations can
occur during the collection, testing, storage of samples for measuring the
biochemical outcomes, if they are collected differently, tested differently
and by different persons. It is always wise to compare the results with some
other external or internal laboratories which are standardized as external
and internal controls for cross checking
Seasonal variations can also occur in risk factor levels and if not
considered, will cause serious lapses in measurement. Hence collection,
storage, testing of samples should be done in a standardized manner that too
at the same time to reduce seasonal variations and observer. |
