1. c/o Ivo W Tremont-Lukats; Culicchia Neurological Clinic; Marrero Louisiana USA
2. The University of Texas MD Anderson Cancer Center; Houston Texas USA
3. Department of Anesthesiology and Perioperative Medicine; Tufts Medical Center; Boston MA USA
4. Center for Evidence-based Medicine; Brown University Public Health Program; Providence RI USA
5. Pain Research, Education and Policy (PREP) Program, Department of Public Health and Community Medicine; Tufts University School of Medicine; Boston Massachusetts USA