The women had annual X-rays of both knees along with analysis of blood levels of estradiol and urine levels of 2-hydroxyestrone and 16?hydroxyestrone, two estrogen metabolites.
这些妇女每年拍双膝X-光片，并测定血液中雌二醇和尿中雌二醇代谢产物2-羟雌酮和16-羟雌酮水平。
The women had annual X-rays of both knees along with analysis of blood levels of estradiol and urine levels of 2-hydroxyestrone and 16?hydroxyestrone, two estrogen metabolites.
这些妇女每年拍双膝X-光片，并测定血液中雌二醇和尿中雌二醇代谢产物2-羟雌酮和16-羟雌酮水平。
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