Nephrology certified in nephrology is called a "nephrologist". The term "nephrology" was first used in about 1960. Before then, the specialty was usually referred to as "kidney medicine." Nephrology concerns the diagnosis and treatment of kidney diseases, including electrolyte disturbances and hypertension, and the care of those requiring renal replacement therapy, including dialysis and renal transplant patients. Many diseases affecting the kidney are systemic disorders not limited to the organ itself, and may require special treatment. Examples include acquired conditions such as systemic vasculitides (e.g. ANCA vasculitis) and autoimmune diseases (e.g., lupus), as well as congenital or genetic conditions such as
Four Organs work, each tone sounds almost in sequence. A continuous maraca beat serves as a rhythmic framework. Reich describes the piece as "the longest V–I cadence in the history of Western Music," the V and I chords being contained within the one chord. "You'll find the chord in Debussy and Thelonious Monk – the tonic on top and the dominant on the bottom." He has cited the music of Pérotin and other twelfth and thirteenth century composers as suggesting the technique of note augmentation used in "Four Organs". For performances of the piece, Reich recommended using electronic organs with as plain