The socioeconomic gradient of alcohol use: an analysis of nationally representative survey data from 55 low-income and middle-income countries.

Xu Y, Geldsetzer P, Manne-Goehler J, Theilmann M, Marcus ME, Zhumadilov Z, Quesnel-Crooks S, Mwalim O, Moghaddam SS, Koolaji S, Karki KB, Farzadfar F, Ebrahimi N, Damasceno A, Aryal KK, Agoudavi K, Atun R, Bärnighausen T, Davies J, Jaacks LM, Vollmer S, Probst C.