TY - JOUR T1 - Development of theory-based health messages: three-phase programme of formative research JO - Health Promotion International UR - https://eprints.whiterose.ac.uk/id/eprint/91490 UR - http://dx.doi.org/10.1093/heapro/dau005 PY - 2014/02/05 AU - Epton T AU - Norman P AU - Harris P AU - Webb T AU - Snowsill FA AU - Sheeran P ED - DO - DOI: 10.1093/heapro/dau005 PB - Oxford University Press VL - 30 IS - 3 SP - 756 EP - 768 Y2 - 2025/11/25 ER -