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I'm sending the blood samples to a lab and this takes some time until the actual testing.

Some information on the tests.

TLI : http://www.vcahospitals.com/main/pet-health-information/article/animal-health/trypsin-like-immunoreactivity/405

CPLI : https://www.vetstream.com/canis/Content/Lab_test/lab00522

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From doing a bit of research, I quote

The various analytes have different stability in serum. Serum TLI and PLI are stable for up to 2 weeks at room temperature. However, serum folate shows limited stability at room temperature. Therefore, serum samples for folate analysis should be kept at 4ºC for not longer than 48 hours, but freezing is preferred. Furthermore, folate is light sensitive and samples should be stored in the dark or wrapped in foil (reference).

So, it should be fine if the tests are conducted in two weeks.

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