SAS 9.3 includes many new features in ODS Graphics. In addition to Rick's favourite (LINEPARM), another new feature particularly useful to track patient data is the support for Cluster Groups for many plots including BoxPlot and support for Interval (Time) axis for BoxPlot..

These options allow easier creation of graphs to track patient response by visit and treatment. The link shows a sample Box Plot created using the SGPLOT Procedure for multiple trreatments over a time x-axis.