TY - JOUR T1 - Learning from COVID-19 related trial adaptations to inform efficient trial design鈥攁 sequential mixed methods study JO - BMC Medical Research Methodology PY - 2022/04/29 AU - Chatters R AU - Cooper CL AU - O鈥機athain A AU - Murphy C AU - Lane A AU - Sutherland K AU - Burton C AU - Cape A AU - Tunnicliffe L ED - DO - DOI: 10.1186/s12874-022-01609-6 PB - BioMed Central VL - 22 IS - 1 Y2 - 2025/05/21 ER -