A 2011 study ?????? ?????????? ????????????????? ???????????????????? ??????? ??? ?????? ???, ?????? ?? ??????? ?????????????? ???????? ??????? ??????? ???????????? ??? ??????? ?????????????? ???? ????????? ??????… ?????? ???? ??????????? ?????????? ??????? ?????????? |?????????? ??????????????????? ??????????? ???????? finish deal ????? ????