The NEURON code for the paper:

O`Halloran DM (2020) Simulation model of CA1 pyramidal neurons reveal opposing roles for the Na+/Ca2+ exchange current and Ca2+-activated K+ current during spike-timing dependent synaptic plasticity. PLoS One 15:e0230327
http://dx.doi.org/10.1371/journal.pone.0230327

is available at the author's github repository: https://github.com/dohalloran/NCX_Model