The agency for health care and quality ( AHRG )
Red blood cell antibodies may show up in your blood if you are exposed to red blood cells other than your own. Antibody serology tests check for the presence or level of specific antibodies in the blood.
Some of the reasons for using a zone defense are: The opposing team has a player/players too quick (in the case of guards) or too big (in the case of forwards or centers) for a man-to-man defense to be effective. Many zones pack defenders in the lane but allow the offensive team to take long-range shots