1. Alliot C (2004) Fluoxetine versus placebo in advanced cancer outpatients [Comment]. J Clin Oncol 22(1):204–205
2. American Psychiatric Association (1994) Diagnostic and statistical manual of mental disorders, 4th edn: DSM-IV. Washington, D.C.: American Psychiatric Association
3. American Psychiatric Association (2006) Practice guidelines for the treatment of psychiatric disorders. Compendium 2006. Arlington, Virginia: American Psychiatric Association
4. Bair MJ, Robinson RL, Katon W, Kroenke K (2003) Depression and pain comorbidity: a literature review. Arch Intern Med 163(20):2433–2445
5. Barrett JE, Williams JW Jr, Oxman TE, Frank E, Katon W, Sullivan M et al (2001) Treatment of dysthymia and minor depression in primary care: a randomized trial in patients aged 18 to 59 years. J Fam Pract 50(5):405–412