opd/
    controllers/
        My_appointments.php
        Opd_visit.php
        Visit_details.php
        patient_portal_api/
            Apiopd.php
        settings/
            Symtoms.php
            Vitals.php
    models/
        Api_opd_visit_model.php
        My_appointment_model.php
        Opd_visit_model.php
    views/
        appointments/
            appointments_list.php
            index.php
        opd_visit/
            close_cases.php
            index.php
            modal.php
        settings/
            symtoms/
                index.php
                modal.php
            vitals/
                index.php
                modal.php
        visit_details/
            index.php
            visit_details_panel.php