Robertson J C, Braune M L
Br Med J. 1974 Nov 2;4(5939):279-81. doi: 10.1136/bmj.4.5939.279.
Splinter haemorrhages, pitting, transverse grooving, ridging, and flaking occur often in the fingernails of the healthy. While they may occur more often in certain diseases they have little diagnostic value in the absence of proper methods of measurement and examination and without a range of normal values for the sexes and age groups.
裂片性出血、凹痕、横向沟纹、嵴状隆起和剥落现象在健康人的指甲中经常出现。虽然它们在某些疾病中可能更常见，但在缺乏适当的测量和检查方法以及不同性别和年龄组的正常数值范围的情况下，它们几乎没有诊断价值。
