Figure 1. Timeline: Three groups had four drugs screened for analgesia three times over the 5-month study.

At the end, a pilot study with localized EPO was performed. Mechanical hypersensitivity testing was performed during and between analgesic testing periods. Each group had the same tests performed. Each group has the same number (n) for all behavioral, analgesic and statistics tests performed, unless stated otherwise. GEL n = 14, sham n = 8, control n = ll.