To find out if you are eligible for screening to participate in the RESPONSE study, please follow the three steps below.

Step 1: Select a location by entering your city, state or zip code to find the research site nearest to you. Select "Take Part" at your preferred research site to proceed to the questionnaire.

Step 2: Fill out the eligibility questionnaire.

Step 3: If eligible, you will be contacted by the research site you selected for further discussion about joining the RESPONSE study.

If you wish to contact a site directly, the phone number for the site contact is included under each site below. You may be eligible to receive reimbursement for time and travel if you choose to participate.