Bhattacharya, Raja, Sampurna Chowdhury, Anita Nandi, Rishav Mukherjee, Manish Kulshrestha, Rohini Ghosh, and Souvik Saha. 2020. “Pre-Exposure Hydroxychloroquine Prophylaxis for COVID-19 in Healthcare Workers: A Retrospective Cohort”. International Journal of Research in Medical Sciences 9 (1):89-96. https://doi.org/10.18203/2320-6012.ijrms20205444.