Schaafsma, T., Wakefield, J., Hanisch, R., Bray, F., Schüz, J., Joy, E. J. M., . . . McCormack, V. (2015). Africa’s Oesophageal Cancer Corridor: Geographic Variations in Incidence Correlate with Certain Micronutrient Deficiencies. PLoS One.

Schaafsma, Torin, Jon Wakefield, Rachel Hanisch, Freddie Bray, Joachim Schüz, Edward J. M. Joy, Michael J. Watts, ja Valerie McCormack. "Africa’s Oesophageal Cancer Corridor: Geographic Variations in Incidence Correlate With Certain Micronutrient Deficiencies." PLoS One 2015.

Schaafsma, Torin, et al. "Africa’s Oesophageal Cancer Corridor: Geographic Variations in Incidence Correlate With Certain Micronutrient Deficiencies." PLoS One 2015.