A Study to Investigate the Genetic Variation of Dopamine Pathway in Patients With Chronic Pain

A Study to Investigate the Genetic Variation of Dopamine Pathway Associated With the Observed Effects of a New Treatment in Former Studies in Patients With Chronic Pain

Patients having completed former trials T1001-01 or T1001-02 will undergo one blood sampling for genotyping purposes. In addition they will compete the personality questionnaires they had completed in the former trial.

Inclusion Criteria:

• have completed T1001-01 or T1001-02 study (Visit 5 completed)
• are men or women of at least 18 years of age
• have given written informed consent approved by the relevant Ethics Committee governing the study sites

Exclusion Criteria:

• have any close relationship with the Investigators or the Sponsor
• are under legal protection, according to the national law