I think this is an interesting aspect to reflect on further and it's important to address the selection of researchers and their backgrounds.
The paper talks about the different levels of experience of the interviewers ranging from 4 to 20 years of experience this can affect the different perceptions of domestic violence and therefore affect the themes deduced from the discourse.
The paper does not discuss whether the researchers took into account the personal bias of the health professionals in directly conversation and facilitating a discussion about domestic violence
