Declarations:
Conflicts of interest/Competing interests : There are no
conflicts of interest to declare. There exists no financial interest or
connection, direct or indirect, or other situation that might raise the
question of bias in this work reported or the conclusions, implications
or opinions stated – including pertinent commercial or other sources of
funding for the individual author(s) or for the associated department(s)
or organisation(s), personal relationships, or direct academic
competition.