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. 2019 Dec 21;59(1):29–62. doi: 10.1007/s00411-019-00826-w

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© The Author(s) 2019

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 10 — Representation of the marrow cavity model. The cavity is represented by a sphere of radius R_c. R_α is the range of the α-particles from ²²³Ra decay. The blue spheres are osteoprogenitor cells, while the brown spheres are hematopoietic stem and progenitor cells and the white spheres are adipose cells. The 10 μm endosteal layer is represented by the brown speckled ring.

Reprinted from Hobbs et al. (2012) with permission of IOP Publishing (color figure online)