TY - JOUR AU - B Neal BT - International Journal of Epidemiology PY - 2018 SP - 1811 EP - 1820 T2 - International Journal of Epidemiology TI - Spot urine samples compared with 24-h urine samples for estimating changes in urinary sodium and potassium excretion in the China Salt Substitute and Stroke Study VL - 47 ER -