TY - CONF T1 - Why is the early intervention development phase for complex health care interventions important? An overview of new guidance JO - Trials PY - 2019/10/22 AU - O'Cathain A AU - Croot E AU - Duncan E AU - Rousseau N AU - Sworn K AU - Turner K AU - Yardley L AU - Hoddinott P ED - DO - DOI: 10.1186/s13063-019-3688-6 PB - BMC VL - 20 IS - Supplement 1 SP - 99 EP - 99 Y2 - 2024/12/22 ER -