on="/clinical/clinical_reports_all_opd_visits" 
                                             actionListener="#{patientEncounterController.listAllEncounters()}"  ></p:commandButton>
                        </h:panelGrid>

                        <p:dataTable value="#{patientEncounterController.items}" var="pe" id="pList" 
                                     emptyMessage="No Patient Encounters during the selected period">
                            <p:column headerText="Visit Date/Time" >
                  