nma_fit.Rd
Takes input data and a model plan and passes to the model engine specified. Current supported engines are the `gemtc` package (using mtc.model & mtc.run) or `rjags` (using jags and dic.samples functions)
nma_fit(model_input)
a list containing named elements fitting_data (data which has been pre-processed) and plan (list object containing all input parameters)
model object of class `rjags` or `mtc.result`