Inclusion Criteria:  Subjects without protection by a legal regime (guardianship, trusteeship) Subjects affiliated to an appropriate social security system Subjects must sign an informed consent form  Inclusion Criteria for Group 1:  - Subjects must have the CHS diagnosis confirmed  Inclusion Criteria for Group 2:  - Subjects must be chronic cannabis consumers and never had CHS  Exclusion Criteria:  Subjects must not have addictive comorbidities or psychoactive substance abuse (except alcohol and tabacco)