TY - STAND AU - S. Price AU - X. Zhang AU - A. Spencer BT - Soc Sci Med DO - 10.1016/j.socscimed.2020.113021 PY - 2020 EP - 113021 T2 - Soc Sci Med TI - Measuring the impact of national guidelines: What methods can be used to uncover time-varying effects for healthcare evaluations? VL - 258 SN - 0277-9536 ER -