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.
Answer by Mark Hagers. Confidence votes 26. There are four basic voices in a mixed choir: two female voices: Soprano (high-pitched) and Alto (low), and two male voices: Tenor (high) and Bass (low). Sometimes intermediary voices are added: Mezzo-soprano between Soprano and Alto and Baritone between Tenor and Bass.