{????? A 3-stage ?? ??????????????? ???? in the Fisher-?????????????????????????? |?????1% ???????{??|??|???|??|?????|????{??|??????|????? 1 ???| |????? 1 ?|???? 1 ?|???? 1 ?|???? 1 ?|???? 1 ?|????????????? — ??????????????????????????????? |??? ?? ?????? ????? ????????{??|???|????|??????????????????????????? ?? ?????” ????????{???|????|????|??