Does one have to attend the actual 20/20 clinic in order to participate and receive the discount for the clinic? Or can you send in a sample separately using the code for the clinic if you can't attend? I know this used to be the case, but can't find anything on the website that mentions this anymore.
Also, are cheek swabs allowed if done this way even though blood is being drawn at the clinic?
Lastly, what is the code for the National clinic if anyone has it handy.
