dataframe of original data used for model fitting. Must include named 'id' column with subject identifiers.
stats
logical TRUE/FALSE: should the median and sd lifespans also be returned? Default is FALSE.
Value
a list containing (i) a summary of which subjects were successfully fit using the biphasic or single phase models, with their corresponding infected cell lifespan estimates ('summary'); (ii) if stats = TRUE: summary statistics for the estimated parameters from the biphasic model ('biphasicstats'); and (iii) if stats = TRUE: summary statistics for the estimated parameters from the single phase model ('singlestats').