TY - JOUR A1 - Helleringer, S. A1 - Liu, L. A1 - Chu, Y. A1 - Rodrigues, A. A1 - Fisker, A.B. T1 - Biases in survey estimates of neonatal mortality: Results from a validation study in urban areas of Guinea-Bissau Y1 - 2020 DO - 10.1007/s13524-020-00911-6 VL - 57 IS - 5 ER -