“…The ASOS investigators also made the most of their valuable resource by conducting additional studies, including this survey. 2,10 Many investigators undertake sub-studies (which answer additional questions using additional data collected in a subset of participants 11 ), sub-analyses (which answer additional questions using the data collected for the main study 12 ), and systematic reviews (which pool the investigators' results with previous research 13 ), and write opinion pieces to explain and contextualise their findings. 14 Apart from generating new information, these studies provide opportunities to involve and recognise site investigators and to develop emerging research leaders.…”