Alveraz A S, McNair D, Wildman J, Hewson J W
Gerontol Clin (Basel). 1975;17(1):1-6. doi: 10.1159/000245547.
A survey based on an analysis of photographs compared the angle at the base of the fingernail in paralysed hands with controls. The significance of the changes in the nail bed angle in relation to clubbing and atrophy of the finger is discussed.