Botulinum toxin injection for tennis elbow

To determine the short (2 to 6 weeks), intermediate (6 weeks to 6 months) and long-term (6 months to 1 year) efficacy, effectiveness and safety of botulinum toxin injection therapy in patients with acute (less than 6 weeks), sub-acute (6 weeks to 13 weeks) and chronic (more than 13 weeks) lateral epicondylitis.

This is a protocol.