Conflict of interest, source of funding and
authorship
The authors declare that they have no conflict of interest.
The authors wish to acknowledge financial support by
means of a Health Professional’s Fellowship from the
Health Research Board, Ireland (HPF/2009/46).
SND conceived and designed the study, acquired, analysed
and interpreted the data, drafted and revised the
manuscript. NS assisted in the design of the study, the
interpretation of data, and revised the manuscript. MO’S
assisted in the design of the study, and revised it for
important intellectual content. SF assisted in the design
of the study, and revised it for important intellectual
content. PFR assisted in the design of the study, the
interpretation of data, the drafting of the manuscript,
and revised the paper for important intellectual content.
KCC assisted in the design of the study and the interpretation
of data, and revised the paper for important
intellectual content. All authors critically reviewed the
manuscript and approved the final version submitted for
publication.