Intended for healthcare professionals

CCBYNC Open access
Research

Clinical efficacy of hydroxychloroquine in patients with covid-19 pneumonia who require oxygen: observational comparative study using routine care data

BMJ 2020; 369 doi: https://doi.org/10.1136/bmj.m1844 (Published 14 May 2020) Cite this as: BMJ 2020;369:m1844

Read our latest coverage of the coronavirus pandemic