Table : Representation of immune cells in mathematical models of bone remodeling. The modeling approach is denoted by superscripts as follows: (1) power law, (2) mass action kinetics, or (3) neither. All models that follow the mass action kinetics approach include RANK, RANKL, OPG, and TGF-β. Models that do not follow this approach but include any of the signals above are indicated by the ‡ symbol. Abbreviations: receptor activator of nuclear factor kappa-B (RANK), receptor activator of nuclear factor kappa-B ligand (RANKL), osteoprotegerin (OPG), transforming growth factor beta (TGF-β), osteoclasts (OCL), hematopoietic stem cells (HSC), preosteoclasts (pOCL), macrophage colony-stimulating factor (MCSF), regulatory T cells (Tregs).