1. Subdepartment of Evolution and Development, Department of Organismal Biology; Uppsala University; Norbyvägen 18A 75236 Uppsala Sweden
2. European Synchrotron Radiation Facility; 71 avenue des Martyrs F-38043 Grenoble Cedex 09 France
3. Subdepartment of Evolution and Development, Department of Organismal Biology, Science For Life Laboratory; Uppsala University; Norbyvägen 18A SE-752 36 Uppsala Sweden
4. Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences; Xiwaidajie 142 Beijing 100044 China