{???? a 3-stage ?????? ??????????????? ????? to the Fisher-??????????????????????????? |?????1% ???????{??|??|???|??|?????|????{??|??????|????? 1 ???| |????? 1 ?|???? 1 ?|???? 1 ?|???? 1 ?|???? 1 ?|?????????? — ???????????????????????????? |??? ?? ?????? ????? ????????{??|???|????|??????????????????????? ?? ?” ???{???|????|????|????|???????????