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. 2018 Mar 1;35(5):703–718. doi: 10.1089/neu.2017.5259

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© Carl Marincowitz et al., 2018; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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FIG. 7. — Meta-regression of risk for neurosurgery by mean age study population (coefficient odds 1.01, 95% confidence interval [CI]: 1.02–1.11; p = 0.01).