The team here at Vitiligozone configured a search filter for the ClinicalTrials.gov website that outputs all the clinical trials recruiting vitiligo patients in your area. ClinicalTrials.gov is a registry of federally and privately supported clinical trials conducted in the United States and around the world. 

Clinical trials are tests designed to determine efficiency and safety of new medicine in patients. Clinical research relies on patients wanting to get involved in the system. Of course there are some risks but with the strict regulations governing any ongoing trial, chances of side-effects are controlled and minimal.

Edit: filter coming soon, in the meantime use the below link to lookup clinical trials in your region

http://www.clinicaltrials.gov/ct2/search

enter your search in the following format: vitiligo AND location
eg.
vitiligo AND Brazil