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Yusuf, IH, B. Foot, and AJ Lotery. The Royal College of Ophthalmologists Recommendations on Monitoring for Hydroxychloroquine and Chloroquine Users in the United Kingdom (2020 Revision): Executive Summary. Springer Nature, 2021.

Yusuf, IH, et al. The Royal College of Ophthalmologists Recommendations on Monitoring for Hydroxychloroquine and Chloroquine Users in the United Kingdom (2020 Revision): Executive Summary. Springer Nature, 2021.