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. 2018 Mar 2;3(2):e644. doi: 10.1097/PR9.0000000000000644

Figure 1.

Figure 1.

Schematic illustration of the study design for assessment of healthy controls and patients with neuropathic pain. Please note that all patients were stimulated at the plantar surface of the foot except for 1 patient who had pain in the infrapatellar region. NRS, numeric rating scale; PREP, pain-related evoked potentials; QST, quantitative sensory testing.