Marie-Christine Gosselin, Esra Neufeld, Heidi Moser, Eveline Huber, Silvia Farcito, Livia Gerber, Maria Jedensjö, Isabel Hilber, Fabienne Di Gennaro, Bryn Lloyd, Emilio Cherubini, Dominik Szczerba, Wolfgang Kainz, and Niels Kuster, Physics in Medicine and Biology, Volume 59, Issue 18, pp. 5287–5303, online August 21, 2014