TY - RPRT TI - Proxy gene-by-environment Mendelian randomization study confirms a causal effect of maternal smoking on offspring birthweight, but little evidence of long-term influences on offspring health AU - Yang, Q. AU - Millard, L. A. C. AU - Davey Smith, G. PY - 2019 DO - 10.1101/601443 UR - https://www.biorxiv.org/content/10.1101/601443v1 ID - 10.1101/601443 ER -