Funding for this research was provided by:
University College London
Article History
Received: 3 July 2019
Revised: 2 August 2019
Accepted: 12 September 2019
First Online: 27 November 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Dr Charlotte Manisty.
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: No informed consent required.
: Institutional Review Board approval was not required because this is a review article.
: • observational• performed at one institution