title: Authors' response.
authors: Zurich, Switzerland.
authors: Mirjam
authors: M
authors: Kuhn
authors: Zurich, Switzerland.
authors: Goran
authors: G
authors: Markic
authors: Zurich, Switzerland.
authors: Raphael
authors: R
authors: Patcas
authors: Athens, Greece.
authors: Ioannis
authors: I
authors: Doulis
authors: Bern, Switzerland.
authors: Peter
authors: P
authors: Göllner
authors: Basel, Switzerland.
authors: Michael P
authors: MP
authors: Hänggi