De Jong, J. M. A., W. A. J. Van Daal, J. W. F. Elte, G. J. Hordijk, and M. Frölich. 1982. “Primary Hypothyroidism As A Complication After Treatment of Tumours of the Head and Neck”. Acta Oncologica 21 (5):299-303. https://doi.org/10.3109/02841868209134019.