TY - JOUR A1 - Ding, Qu Jian A1 - Hesketh, Therese T1 - Family size, fertility preferences, and sex ratio in China in the era of the one-child family policy: Results from national family planning and reproductive health survey Y1 - 2006 DO - 10.1136/bmj.38775.672662.80 UR - https://doi.org/10.1136/bmj.38775.672662.80 VL - 333 IS - 7564 ER -