Received: 27 July 2018
Accepted: 24 June 2019
First Online: 10 July 2019
Ethics approval and consent to participate
: Ethical approval for this study was granted by the National Research Ethics Service Committee North West – Lancaster (reference number 16/NW/0050). All participants were aged 16 years or above and provided their full informed consent. Informed consent was collected as implied consent, indicated by questionnaire return. Use of an implied consent method was requested and subsequently approved by the ethics committee to allow for anonymous completion.
: Not applicable.
: The authors declare that they have no competing interests.