RARγ x RARα x TYRP1 x GR x RARβ2

主要目的：评价维氟醌乳膏治疗中、重度黄褐斑的疗效和安全性。 次要目的：以临床终点方法评价维氟醌乳膏与参比制剂的临床等效性；通过监测临床试验中维A酸、氟轻松、氢醌三种成分的系统吸收，明确受试制剂与参比制剂的系统暴露情况。

To evaluate safety and efficacy of Tri-Luma® cream as an adjunctive treatment to cryotherapy when used in the pre- and post-procedure phases for the treatment of solar lentigines on the back of the hands and in the prevention of post-inflammatory hyperpigmentation after cryotherapy.