title: Medical concern for colloidal silver supplementation: argyria of the nail and face.
authors: Department of Dermatology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors: Se-Won
authors: SW
authors: Park
authors: Hyun-Tae
authors: HT
authors: Shin
authors: Kyung-Tae
authors: KT
authors: Lee
authors: Dong-Youn
authors: DY
authors: Lee