Welcome!

Thank you for your interest in clinical research about Complex Regional Pain Syndrome (CRPS). 

This screening survey will evaluate your eligibility for two different studies on CRPS utilizing two different treatment methods: Low-Dose Naltrexone (LDN) and Transcranial Magnetic Stimulation (TMS).

You may be eligible for one study or the other. If you are eligible for both you may be given a choice of the LDN study and/or the TMS study.

This screening survey will take about 15 minutes to complete.

Please see the Participant Information Sheet below for more details about LDN and TMS.

All your survey responses will be kept confidential as required by law.

The purpose of this online survey is to see if you meet the criteria for taking part in our research studies. Another purpose is to see if you want to hear about future research studies.

You can choose if you want or do not want to take part in this screening survey. You may choose not to answer any question.  You also may choose to stop participating in this survey at any time by not submitting your answers. If you refuse to answer the questions, there will be no penalty and you will not lose any benefits to which you otherwise would be entitled.

The risk of taking part in this survey is very small.  If you qualify to take part in the study your information will be kept confidential, but there is a small risk that people outside of the research team could learn about your participation. If you are interested in learning about future research studies, then we will add your name to our contact list.  If you are not interested in the study, then we will destroy your survey responses.

The benefit to you of taking part in this survey is that you will find out whether you can take part in this research study. The benefit to you of being on our contact list is that you will hear about future participation opportunities. You will not be compensated for answering questions in this interview.

If you have any questions, concerns, or complaints about this survey, contact Protocol Director, Sean Mackey, MD, PhD, at 650-725-9636. If you want to talk to someone separate from the research team about a concern, complaint, or your rights as a possible research participant, please contact the Stanford Institutional Review Board (IRB) at 650-723-5244 or toll-free at 1-866-680-2906. 

Thank you for your participation!

You have selected an option that triggers this survey to end right now.