Conflict of Interests

Authors are required to disclose all sources of institutional, private and corporate financial support for their study. Donors of materials (for free or at a discount from current rates) should be named in the source of funding and their location (town, state/county, country) included. Other donors will be identified in the text. If no funding has been available other than that of the author's institution, this should be specified upon submission. Authors are also required to disclose any potential conflict of interest. These include financial interests (for example patent, ownership, stock ownership, consultancies, speaker's fee,) or provision of study materials by their manufacturer for free or at a discount from current rates. Author's conflict of interest (or information specifying the absence of conflicts of interest) and the sources of funding for the research will be published under a separate heading entitled “Conflict of Interest and Sources of Funding Statement”. Any experiments involving animals must be demonstrated to be ethically acceptable and where relevant conform to national guidelines for animal usage in research