Protective Effect of <i>Castanopsis sieboldii</i> Extract against UVB-Induced Photodamage in Keratinocytes oleh Hye Rim Lee, Ji Hye Yang, Ji Hyun Lee, Kyu Min Kim, Sam Seok Cho, Jin Sol Baek, Jae Min Kim, Moon-Hee Choi, Hyun-Jae Shin, Sung Hwan Ki