Funding for this research was provided by:
The Russell Trust Postgraduate Award
First Online: 31 July 2019
Compliance with Ethical Standards
: Martha Lucia Borras-Guevara, Carlota Batres and David Ian Perrett declare they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Research protocols were approved by the Ethics Committee of the University of St Andrews.
: Informed consent was obtained from all participants involved in this study.