TY - STAND AU - A. Matcho AU - P. Ryan AU - D. Fife AU - D. Gifkins AU - C. Knoll AU - A. Friedman BT - PLoS One DO - 10.1371/journal.pone.0192033 M1 - 2 PY - 2018 EP - e0192033 T2 - PLoS One TI - Inferring pregnancy episodes and outcomes within a network of observational databases VL - 13 SN - 1932-6203 ER -