According to their findings, presented at the University of Bologna in 2010, Callas had dermatomyositis, a disease that causes a failure of the muscles and tissues, including the larynx.
Podľa ich zistení, ktoré predložili na univerzite v Bologni v roku 2010, trpela Callasová dermatomyozitídou, chorobou, ktorá spôsobuje zlyhanie svalov a tkanív, vrátane hrtana.