1. Tuomo J. Meretoja, Lassi Haasio, Reetta Sipilä, and Eija Kalso, Helsinki University Hospital; Tuomo J. Meretoja, Lassi Haasio, Reetta Sipilä, Samuli Ripatti, and Eija Kalso, University of Helsinki, Helsinki, Finland; Kenneth Geving Andersen and Henrik Kehlet, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Julie Bruce, University of Warwick, Coventry; and Neil W. Scott, University of Aberdeen, Aberdeen, United Kingdom.