When instruments or reagents were the cause of the problems, we corrected the function of the instruments or reagents and reanalyzed the specimens. |
Nonetheless, to assess the robustness of our findings in relation to negative values, we also reanalyzed our data, excluding these observations or recoding them as zero. |
Goodman of the Cancer Research Center of Hawaii in Honolulu, who coauthored one of three previous studies, has now reanalyzed a portion of his data. |