Data collection
Data collection comprised semi-structured telephone interviews. We used Normalization Process Theory (NPT) to inform design of the data collection materials and subsequent analysis. NPT provides a theoretical framework to explore and explain the work involved in implementing new complex interventions into routine practice [Coherence: how people individually and collectively make sense of a new interventionCognitive Participation: how people build a community of practice around a new interventionCollective Action: the operational work that people do to enact a new interventionReflexive Monitoring: the appraisal work that people do to understand how a new intervention affects them [These four core constructs form the basis of the Normalization MeAsure Development (NoMAD) instrument, which assesses and monitors normalisation processes from the healthcare professionals’ perspective. NoMAD consists of three general items to assess familiarity with the intervention and whether the intervention is a normal part of the healthcare professional’s work or could become a normal part of their work; and 20 items that represent the four core constructs of NPT [The interview topic guide was structured using the NoMAD questionnaire items [see 