Ringkamp Matthias, Raja Srinivasa N
Department of Neurosurgery, Johns Hopkins University, School of Medicine, 600 N Wolfe St., Meyer 5-109, Baltimore, MD 21287, USA Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University, School of Medicine, Baltimore, MD 21287, USA.
Pain. 2014 Jul;155(7):1189-1191. doi: 10.1016/j.pain.2014.04.002.