text: <unk>  are lines of discoloration across the nails of the fingers and toes after an episode of poisoning with arsenic or thallium or other heavy metals. They are typically white bands traversing the width of the nail. As the nail grows they move towards the end, and finally disappear when trimmed.
option_0: Mees' lines
option_1: Kerley lines
option_2: Schmidt-Lanterman incisures
option_3: Vocal folds
option_4: Horror vacui
option_5: Ondine's curse
option_6: Microtia
option_7: Half and half nails