Handling changes in MRI acquisition parameters in modeling whole brain lesion volume and atrophy data in multiple sclerosis subjects: Comparison of linear mixed-effect models by Alicia S. Chua, MS, Svetlana Egorova, MD, PhD, Mark C. Anderson, MS, Mariann Polgar-Turcsanyi, MS, Tanuja Chitnis, MD, Howard L. Weiner, MD, Charles R.G. Guttmann, MD, Rohit Bakshi, MD, Brian C. Healy, PhD

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