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plate·let-ac·ti·vat·ing factor

n :  phospholipid that is produced esp. by mast cells and basophils, causes the aggregation of blood platelets and the release of blood-platelet substances (as histamine or serotonin), and is a mediator of inflammation (as in asthma) - abbr. PAF .
 
 

 
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Pushmataha Hospital (Antlers, Oklahoma - Pushmataha County)