The original version of this article unfortunately contained an omission.
The Acknowledgements section was missing. The Acknowledgements are now given below.
Acknowledgements
The authors would like to thank Dr Stefano Cacciatore, Ms Meghan Cupp, Ms Natalie Fitzpatrick, Prof Spiros Denaxas, Dr Arturo Gonzalez-Izquierdo, Mr Kenan Direk, Dr Charlotte Warren-Gash, Mr Nishchay Mehta, Denise Beales, Giovanna Ceroni, Dr Jill Ellis, Dr Hannah Evans and Prof Rolf Groenwold for their advice and assistance provided in undertaking this study. The authors would additionally like to thank our patient and public involvement panel consisting of Donna Self and Lindsey Fairchild (parents of children with Down's Syndrome) and representatives from the Down's Syndrome Association (Stuart Mills and Vanda Ridley) who assisted in research design, analyses, interpretation and dissemination throughout the study.
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