Dichter's breakthrough came with a focus group study he did for Betty Crocker foods.

狄克特的突破是一次消费者小组研究，关于贝蒂·克劳客食品公司。

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In the study, Gelb and her colleagues conducted focus-group interviews with 132 women ages 40 to 60 in Chicago, Los Angeles, Miami and New York City.

MSN: 5 signs of gynecological cancer women ignore