Yoeri Bemelmans

Chapter 9 148 Acknowledgements The authors would like to thankMiss. Robin Faassen, Mr. Kevin Crijns, Mr. Kevin Konings and Mr. Ivo Buil for their work in analysing the raw data from the activity monitor. Compliance with ethical standards Conflict of interest No benefits in any formhave been received or will be received froma commercial party related directly or indirectly to the subject of this article.