???????? ??? ?????? ???? ?????? ???? ???????? to use strain ??? extend ???????? ???? ??????????????????????? a ?????????? ??? ???{??? ?????? ??? ?????????? ??????????? ????????? ???????? ???? care ?????????? ?????? ???????? ???????????? ?????????? ??? ?????? ??? ?????? ???????????? ????? ?????? ???????????? NCCIH.|?? ????????????????? ????????? ???