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.
Lesson Summary. In vocal music, baritone refers to the medium-range voice category in adult males or to a singer who possesses that voice. The baritone voice has a lower vocal range than the tenor voice type but a higher range than the bass. The baritone voice appears in choral music, opera, and musical theater.