Langer, S., Chew-Graham, C. A., Drinkwater, J., Afzal, C., Keane, K., Hunter, C., …Salmon, P. (2014). A motivational intervention for patients with COPD in primary care: qualitative evaluation of a new practitioner role. BMC Family Practice, 15, Article 164. https://doi.org/10.1186/1471-2296-15-164