Erratum: Hansen, Lund, Sangill, and Jespersen. Experimentally and Computationally Fast Method for Estimation of a Mean Kurtosis. Magnetic Resonance in Medicine 69:1754–1760 (2013). Issue 6 (3rd January 2014) - Hansen, Brian; Lund, Torben E.; Sangill, Ryan; Jespersen, Sune Nørhøj