It seems on www.clinicalconnection.com there is a nationwide study for one urine sample. They send you a FedEx kit when you send the sample you get a $ 25.00 amazon gift card in the mail. go to www.clinicalconnection.com and type in your zip code and at the bottom of the page they will list this nationwide study for neurolab. I just saw it this morning. Also if you select notify me about new trials you will get an e-mail every time a new study comes out in your area.