TY - JOUR T1 - Propensity Score Matching in the Absence of Randomized Controlled Trials: A Case Study on the Effects of Breastfeeding on Childhood Obesity UR - https://doi.org/10.4135/9781529719475 PY - 2020/01/24 AU - Gray L ED - DO - DOI: 10.4135/9781529719475 PB - SAGE Publications Ltd Y2 - 2025/11/21 ER -