Hydroxychloroquine plus personal protective equipment versus personal protective equipment alone for the prevention of laboratory-confirmed COVID-19 infections among healthcare workers: a multicentre, parallel-group randomised controlled trial from India
Tirupakuzhi Vijayaraghavan$n$ et al., BMJ Open, doi:10.1136/bmjopen-2021-059540
https://c19hcq.org/tirupakuzhi.html