Objective To determine the taste-blindness gene frequency of Han nationality juveniles to PTC in Henan Province.
目的测定河南省汉族青少年苯硫脲（ PTC）味盲基因频率。
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Lao Tzu said, "Iridescent colors cause blindness. Beautiful music causes deafness; delicious food causes loss of taste. Racing and hunting cause madness."