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AALPHI

Adolescents and Adults Living with Perinatal HIV cohort

ACTT-EU/UK

Adaptive COVID-19 Treatment Trial in the EU & UK (ACTT-EU/UK) - A Multicenter, Adaptive, Randomised Blinded Controlled Trial of the Safety and Efficacy of Investigational Therapeutics for the Treatment of COVID-19 in Hospitalised Adults

Add-Aspirin

A phase III double-blind, placebo-controlled, randomised trial assessing the effects of aspirin on disease recurrence and survival after primary therapy in common non-metastatic solid tumours

ANYSNAKES

Advancing Management of Systemic Envenoming by testing multiple Antivenoms

ARCHERY

A prospective observational study of artificial intelligence based radiotherapy treatment planning for cervical, head and neck and prostate cancer

ARREST

Adjunctive Rifampicin to Reduce Early mortality from STaphylococcus aureus bacteraemia: a multi-centre, randomised, blinded, placebo controlled trial

ARROW

Anti-retroviral research for Watoto

AXIS

A randomised trial of post-operative portal vein infusion of fluorouracil vs surgery alone for colorectal cancer, and of peri-operative radiotherapy vs no radiotherapy for rectal cancer