The authors of the paper:

Jacoby J, Nath A, Jessen ZF, Schwartz GW (2018) A Self-Regulating Gap Junction Network of Amacrine Cells Controls Nitric Oxide Release in the Retina. Neuron 100:1149-1162.e5
doi:10.1016/j.neuron.2018.09.047

have made their NEURON and MATLAB code available at their github repository:

https://github.com/SchwartzNU/SymphonyAnalysis