Hansen, E S S, Stewart, N J, Wild, J M, Stødkilde-Jørgensen, H & Laustsen, C 2016, ' Hyperpolarized (13) C,(15) N2-Urea MRI for assessment of the urea gradient in the porcine kidney ', Magnetic Resonance in Medicine . https://doi.org/10.1002/mrm.26483