|Cyclical neutropenia is also known as cyclic neutropenia, a form of neutropenia which is a granulocyte disorder characterized by an abnormally low number of neutrophils. This tends to occur for every three weeks and lasts from three to six days due to changing rates of cell production by the bone marrow. A journal is a periodical publication intended to further progress of science, usually by reporting new research. Most journals are highly specialized, although some of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a wide range of scientific fields. Journals contain articles that peer reviewed, in an attempt to ensure that articles meet the journal's standards of quality, and scientific validity. Each such journal article becomes part of the permanent scientific record.