Funding for this research was provided by:
University of Manchester (08/H1006/46)
Received: 27 January 2018
Accepted: 8 January 2019
First Online: 28 January 2019
Ethics approval and consent to participate
: “The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human experimentation and with the Helsinki Declaration of 1975, and its most recent revision”. The study was approved by both, the Local Research Ethics Committee and the University of Manchester (Registration number 10/H1005/62). The women were approached from October 2008 to February 2009, after obtaining written informed consent.
: The participants were aware that this piece of work is going to be published and provided written informed consent.
: The authors declare that they have no competing interests.
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