Neurosurgery Letter to the Editor. Class imbalance in machine learning for neurosurgical outcome prediction: are our models valid? By Victor E. Staartjes On Aug 18, 2018 0 Share Journal of Neurosurgery: Spine, Ahead of Print. http://thejns.org/doi/abs/10.3171/2018.5.SPINE18543?mi=67t04w&af=R neurosurgery 0 Share FacebookTwitterGoogle+ReddItWhatsAppPinterestEmail