1 Examples of viral infections include, mumps or hepatitis B. 2  Some autoimmune conditions-such as lupus, or Sjogren's syndrome. 3  Injury to the pancreas. 4  Idiopathic-about 15% of all cases of acute pancreatitis are termed idiopathic pancreatitis.
For instance, in America, these kinds of drums are referred to as the doumbek. They are widely used in E. Europe, N. Africa and a larger part of Asia. Good examples of these kinds of drums include the Bendir, Riq, Tamburine, Irish bodhran etc. These drums are mostly made of wood which forms almost a perfect circle.
The drum is a percussive musical instrument that is comprised of one or more membranes stretched over a hollow body. Sound is produced by striking the membrane, commonly called the head or skin. Hand drums are a very special type of drum. Hand drums are distinguished from other membranophones by their striker: the hand. Other membranophones produce sound when struck by an object foreign to the drummer.