Pauwels, S., Geubel, A., Lejeune, D., Otte, J.-B., & Beckers, C. (1983). C-14-aminopyrine Breath Test - Long-term Effects of Portacaval Shunting, a Controlled-study. European journal of nuclear medicine, 8(5), A16-A16. https://doi.org/10.1007/BF00256735 (Original work published 1983)