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MLA Citation
Alastair Webb et al.. “Design of a randomised, double-blind, crossover, placebo-controlled trial of effects of sildenafil on cerebrovascular function in small vessel disease: Oxford haemodynamic adaptation to reduce pulsatility trial (OxHARP).” European stroke journal, vol. 6, 2021, pp. 283–290. http://access.bl.uk/ark:/81055/vdc_100135319252.0x00000c