Conflicts of Interest

All authors must disclose any and all conflicts of interest, they may have  with publication of the manuscript or an institution or product that is  mentioned in the manuscript and/or is important to the outcome of the study  presented. Authors should also disclose conflicts of interest with products that  compete with those mentioned in their manuscript. A conflict of interest may  exist when an author (or the author’s institution or employer) has financial or  personal relationships or affiliations that could influence (or bias) the  author’s decisions, work, or manuscript. If there are no interests to declare  then please state this: 'Declarations of interest: none'.