“…These articles comprised one retrospective chart review [121], one prospective cohort [120], six case series [117,125,127,128,132,133], 14 clinical trials [109,111,112,119,122,123,126,131,135,138,140,146,147,150], two controlled clinical trials [130,136], 16 RCT's [108,113,114,116,124,129,134,137,139,141,143,145,146,148,149,152], four systematic reviews/meta analyses [110,115,142,144], and one treatment guideline [118]. Interventions evaluated therein were piroxicam [114], gabapentin [126], intrathecal baclofen [146], sympathetic blockade (lumbar, stellate ganglion and intravenous) (n = 5) [122,123,134,143,149], corticosteroids (n = 3) [114,119,135], calcium regulating medication (bisphosphonates, calcitonin) (n = 4) [110,116,138,142], NMDA antagonists (magnesium sulphate, ketamine, memantine) (n = 9) [111,121,125,131,140,146-148,152], free radical scavengers (mannitol, vitamin C) (n = 3) [129,135.137], nitric oxide regulating medication (n = 3) [133,141,151], spinal cord stimulation (n = 5) [112,115,120,128,132], regional anaesthesia (n = 2) [113,117], physiotherapy and rehabilitation medicine (physiotherapy, ...…”