Tapered doses

• “three times a week for the first two weeks, then twice a week for the next two weeks, the once a week thereafter”

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               <comp xsi :type="SXPR_TS">
                              <comp xsi :type="IVL_TS">
                                              <low value=$date/>
                                              <width value="14" unit="d"/>
                              </comp>
                              <comp xsi :type="PIVL_TS" operator="A">
                                              <period value="2.3333" unit="d"/>
                              </comp>
               </comp>
               <comp xsi :type="SXPR_TS" operator="I">
                              <comp xsi :type="IVL_TS">
                                              <low value=$date+14/>
                                              <width value="14" unit="d"/>
                              </comp>
                              <comp xsi :type="PIVL_TS" operator="A">
                                              <period value="3.5" unit="d"/>
                              </comp>
               </comp>
               <comp xsi :type="SXPR_TS" operator="I">
                              <comp xsi :type="IVL_TS">
                                              <low value=$date+28/>
                              </comp>
                              <comp xsi :type="PIVL_TS" operator="A">
                                              <period value="7" unit="d"/>
                              </comp>
               </comp>
</effectiveTime>