<unk>  may occur due to nicotine, dyes (including hair dyes and<unk>  polish), potassium permanganate, mercury compounds, hydroquinone, elemental iron, mepacrine, photographic developer, anthralin, chrysarobin, glutaraldehyde, or resorcin.
Staining of the nail plate
Mechanical properties of biomaterials
Joint stability
Tactile discrimination
Bone conduction
Skin flora
Color vision
Range of motion