Correction: Spatial separation of two different pathways accounting for the generation of calcium signals in astrocytes

There is an error in Equation 4. It should read:

$${\left[{Ca}^{2+}\right]}_o-{\left[{Ca}^{2+}\right]}_{o_{rest}}={\left[{Ca}^{2+}\right]}_{i_{rest}}-{\left[{Ca}^{2+}\right]}_i+{\left[{Ca}^{2+}\right]}_{{ER}_{rest}}-{\left[{Ca}^{2+}\right]}_{ER}$$