Birring, S. S., Brew, J., Kilbourn, A., Edwards, V., Wilson, R., & Morice, A. H. (2017). Rococo study: a real-world evaluation of an over-the-counter medicine in acute cough (a multicentre, randomised, controlled study). BMJ Open, 7(1), e014112. https://doi.org/10.1136/bmjopen-2016-014112