Why?: Don't see any need to do this. As long as the tube is clean it is good. If you are using dye for your tf could consider using a green or blue as this color is not as easily confused with blood.
Answered 2/17/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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