Objective to master the epidemical characteristics and risk factors of adolescent acne in urban and rural areas in southern Hebei.
目的了解冀南地区城乡青少年面部痤疮的流行病学特点，分析其患病的主要危险因素。
Objective to master the epidemical characteristics and risk factors of adolescent acne in urban and rural areas in southern Hebei.
目的了解冀南地区城乡青少年面部痤疮的流行病学特点，分析其患病的主要危险因素。
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