McDonald Laura, Schultze Anna, Simpson Alex, Graham Sophie, Wasiak Radek, Ramagopalan Sreeram V
Centre for Observational Research and Data Sciences, Bristol-Myers Squibb, Uxbridge UB8 1DH, UK.
Real World Evidence, Evidera, London W6 8DL, UK.
BMJ. 2017 Oct 24;359:j4866. doi: 10.1136/bmj.j4866.