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\bibitem{Gillam_etal2013} Gillam, J. E., Solevi, P., Oliver, J. F., \& Rafecas, M. (2013). Simulated one-pass list-mode: an approach to on-the-fly system matrix calculation. \textit{Phys. Med. Biol.}, \textit{58}(7), 2377--2394.

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