METHODS: Keloids and normal skins(negative controls) were obtained from 6 patients and 6 normal people who operated in the Department of Plastic Surgery, Peking University Third Hospital.

方法：瘢痕疙瘩和正常皮肤（作为阴性对照）均来自北京大学第三医院成形科手术患者各6例。

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Methods: The clinical data of 144 patients with gestational thrombocytopenia in Peking University First Hospital during 1993 to 2003 were retrospectively analyzed.

方法：回顾性分析1993 ~ 2003年我院妊娠合并血小板减少的144例患者的临床资料。

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In 1990, the cosmetic surgery center established in Peking University Third Hospital, it is the earliest cosmetic surgery center in p.

1990年北医三院美容中心成立，也是全国成立最早的美容外科中心。

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Gordon Liu of Peking University says about 40% of hospital revenues typically come from such sales, with another 40-50% from services such as diagnostic tests and treatments.

ECONOMIST: Health-care reform: Heroes dare to cross | The