Postanaesthesia pulmonary complications after use of muscle relaxants in Europe: Study protocol of the POPULAR study. Issue 5 (May 2016) - Fagerlund, Malin Jonsson; Fink, Heidrun; Baumüller, Eva; Ulm, Kurt; Hollmann, Markus W.; Meistelman, Claude; Hunter, Jennifer; Leva, Brigitte; Damster, Sandrine; Eriksson, Lars I.; Blobner, Manfred