1. School of Biological and Behavioural Sciences, Queen Mary University of London, London, U.K.
2. Division of Natural Sciences, Mount Marty College, Yankton, South Dakota, U.S.A.
3. Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
4. Philip J. Currie Dinosaur Museum, Wembley, Alberta, Canada
5. Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
6. Redpath Museum, McGill University, Quebec, Canada.