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Vander Borght, T., Labar, D., Pauwels, S., & Lambotte, L. (1991). Production of [2-11C]thymidine for quantification of cellular proliferation with PET. International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 42(1), 103–104. doi:10.1016/0883-2889(91)90131-j 
10.1016/0883-2889(91)90131-j