Barbisan, J. N., F. D. Fuchs, and B. D. Schaan. “Prevalence of Thyroid Dysfunction in Patients With Acute Atrial Fibrillation Attended at a Cardiology Emergency Room”. São Paulo Medical Journal, vol. 121, no. 4, July 2003, pp. 159-62, https://periodicosapm.emnuvens.com.br/spmj/article/view/2629.