Cervical Cancer Research

I was asked to participate for cervical cancer research when I went to the doctor the other day. They told me I could have $40.00 wal-mart gift card to just give my sample.
I said OK. Then only 3% people would be chosen for the research...then I would get $100.00...Well, I guess I was a lucky one. I was chosen for the research.
They will pay for the exam for the cancer.
I told them I would come as long as it's not painful.
I did it last week...
They took my tissue as a sample for their research, and I got $100.00 check.
It wasn't so bad, but I was clumpy for a few days. I am just hoping the result would come back as negative...I will find out in a few months.