BibTex format
@unpublished{Hopkinson:2020:10.1101/2020.05.18.20105288,
author = {Hopkinson, NS and Rossi, N and El-Sayed, Moustafa J and Laverty, AA and Quint, JK and Freydin, MB and Visconti, A and Murray, B and Modat, M and Ourselin, S and Small, K and Davies, R and Wolf, J and Spector, T and Steves, CJ and Falchi, M},
doi = {10.1101/2020.05.18.20105288},
publisher = {Cold Spring Harbor Laboratory},
title = {Current tobacco smoking and risk from COVID-19: results from a population symptom app in over 2.4 million people},
url = {http://dx.doi.org/10.1101/2020.05.18.20105288},
year = {2020}
}