The NEURON and Python code for the paper:

Lei CL, Kellard JA, Hara M, Johnson JD, Rodriguez B, Briant LJB (2018) Beta-cell hubs maintain Ca2+ oscillations in human and mouse islet simulations. Islets 10:151-167
http://dx.doi.org/10.1080/19382014.2018.1493316

is available at the authors github repository

https://github.com/chonlei/bHub_sim