Liddell K
Br J Dermatol. 1976 Jun;94(6):633-7. doi: 10.1111/j.1365-2133.1976.tb05162.x.
The incidence of eczema was assessed in acne patients and their first degree relatives and compared with control (non-acne) subjects and their relatives. It was found that there was a statistically decreased incidence of endogenous eczema in the acne patients.