ACKNOWLEDGMENTS
This study was supported by a grant from Shiraz University of Medical Sciences (grant number 89-5418). The authors thank the employees at the wheat flour mills for their participation. We also thank Ms. Rahmani for her assistance with data collection, Mr. Taghipoor, and Mrs. Beheshtaeen for coordination with the wheat flour mills, and K. Shashok for improving the use of English in the article.
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