public void fieldChanged(Field field, int context) {
   ButtonField btn4 = (ButtonField) field;
   if (btn4.getLabel().toString() == "Next") {
     cs6.storeUIFieldsToCitation();
     if (cs6.field_alcohol.getChecked() == true) {
       UiApplication.getUiApplication().pushScreen(new CitationScreen7(c));
     } else {
       UiApplication.getUiApplication().pushScreen(new CitationScreen8(c));
     }
   } else if (btn4.getLabel().toString() == "Prev") {
     cs6.storeUIFieldsToCitation();
     UiApplication.getUiApplication().popScreen(cs6);
   }
 }