1. DGSS Leitlinien Kommission (2009) S3-Leitlinie Langzeitanwendung von Opioiden bei nicht tumorbedingten Schmerzen (LONTS). http://www.uni-duesseldorf.de/AWMF/ll/041-003.htm
2. Reinecke H, Sorgatz H (2009) S3-Leitlinie LONTS. Schmerz 23:440–447
3. National Opioid Use Guideline Group (2010) Canadian guideline for safe and effective use of opioids for chronic non-cancer pain. http://nationalpaincentre.mcmaster.ca/opioid/
4. Chou R, Fanciullo GJ, Fine PG et al (2009) Clinical guidelines for the use of chronic opioid therapy in chronic noncancer pain. J Pain 10(2):113–130
5. Trescot AM, Helm S, Hansen H et al (2008) Opioids in the management of chronic non-cancer pain: an update of American Society of the Interventional Pain Physicians’ (ASIPP) guidelines. Pain Physician 11:S5–S62