TY - CHAP T1 - How to develop complex interventions T2 - Complex Interventions in Health UR - https://doi.org/10.4324/9781003495642-6 PY - 2026/01/21 AU - O'Cathain A ED - DO - DOI: 10.4324/9781003495642-6 PB - Routledge SP - 33 EP - 38 Y2 - 2026/02/01 ER -