Rheumatoid arthritis (RA) causes premature mortality, disability and compromised quality of life in the industrialized and developing world (1). Rheumatoid arthritis is a systemic inflammatory disease which manifests itself in multiple joints of the body.
A baritone is the most common type of male voice whose range lies midway between the high tenor voice and the low bass voice. In comedic operas, he is often the leader of the funny business, but he can also be the hero, who sacrifices himself for the tenor or soprano, or the villain.
The Bass Baritone has most of the characteristics of the Dramatic Baritone. but usually has a lower range, and a darker tone. And that tone can lead the listener to think the Bass Baritone is singer lower than is actually the case.