Goodacre, S., Cohen, J., Bradburn, M., Gray, A., Benger, J., & Coats, T. (2013). Intravenous or nebulised magnesium sulphate versus standard therapy for severe acute asthma (3Mg trial): a double-blind, randomised controlled trial. The lancet. Respiratory medicine, 1(4), 293-300. https://doi.org/10.1016/S2213-2600%2813%2970070-5