,
Herrmann, D
Intemann, T
Lauria, F
Mårild, S
Molnár, D
Moreno, L A
Sioen, I
Tornaritis, M
Veidebaum, T
Pigeot, I
Ahrens, W
Article History
First Online: 15 September 2014
Competing interests
: The authors declare no conflict of interest.