There appears to be a mistake in the legend for Fig 1B.
(B) Beginning the day after SNL, animals received daily subcutaneous (s.c.) injections of morphine (2.5 mg/kg), imatinib (5 mg/kg), morphine + imatinib or vehicle and mechanical sensitivity determined. "bold italic"Systemic co-administration of morphine and imatinib completely eliminated allodynia after nerve injury. n = 5–9 per group.
Systemic or sub cutaneous? From the methods and results text it is clear that this is s.c. so "systemic" should be removed or replaced with "repeated".