TY - JOUR A1 - Lyons-Amos, M.J. A1 - Stones, T. T1 - Trends in demographic and health survey data quality: An analysis of age heaping over time in 34 countries in sub Saharan Africa between 1987 and 2015 Y1 - 2017 DO - 10.1186/s13104-017-3091-x JF - BMC Research Notes VL - 10 IS - 1 ER -