character string indicating whether the biphasic or single phase fits should be plotted. Must be either "biphasic" or "single". Defaults to "biphasic".
detection_threshold
numeric value indicating the detection threshold of the assay used to measure viral load. Default value is 20.
textsize
numeric value for base text size in ggplot. Default is 9.
pointsize
numeric value for point size in ggplot. Default is 1.
linesize
numeric value for line width in ggplot. Default is 0.5.
facet_col
numeric value for number of columns to use when faceting subject panels. Defaults to NULL (i.e. ggplot default).