Authors: Gerben Ter Riet; Paula Chesley; Alan G Gross; Lara Siebeling; Patrick Muggensturm; Nadine Heller; Martin Umbehr; Daniela Vollenweider; Tsung Yu; Elie A Akl; Lizzy Brewster; Olaf M Dekkers; Ingrid Mühlhauser; Bernd Richter; Sonal Singh; Steven Goodman; Milo A Puhan Journal: PLoS One Date: 2013-11-20 Impact factor: 3.240