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