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.
Common Opera voice types. Soprano. For females, the highest voice type is the soprano. In operatic drama, the soprano is almost always the heroine because she projects innocence and youth. Within this category, there are other sub-divisions such as, coloratura soprano, lyric soprano, and dramatic soprano.