Emulating real-world GLP-1 efficacy in type 2 diabetes through causal learning and virtual patients - Calum Robert MacLellan; Hristo Petkov; Conor McKeag; Feng Dong; David John Lowe; Roma Maguire; Sotiris Moschoyiannis; Jo Armes; Simon Skene; Alastair Finlinson; Christopher Sainsbury (PLOS Digital Health)