PolaĆska, Adriana High-frequency ultrasonography (20 MHz) in circumscribed palmar hypokeratosis - new observations. [electronic resource] - Archives of medical science : AMS Dec 2016 - 1389-1391 p. digital Publication Type: Journal Article ISSN: 1734-1922 Standard No.: 10.5114/aoms.2016.62920 doi