Chronic myeloid leukemia (CML) is a rare type of blood cancer and occurs when the bone marrow makes too many of one type of white blood cell, called myeloid cells. Almost all CML cases are caused by an abnormal chromosome called the Philadelphia chromosome.
These are new 18X24 Quality Picture Mats. The Openings are Bevel cut 12.5 x 18.5 to fit a 13X19 photo or print. These mats are cut from Quality white core mat board and are excellent for framing photos or prints.
Paper Sizes - commonly used in U.S. Offices. Office paper sizes as Letter, Legal, Tabloid and more. The ISO standard paper sizes are not commonly used in the United States and Canada. Instead paper formats like Letter (8.5 x 11 inches), Legal (8.5 x 14 inches), Executive (7 x 10 inches), and Ledger/Tabloid (11 x 17 inches) are widely used. The Letter, Legal, Tabloid, and other formats (although not these names) are defined in the American National Standard ANSI X3.151.