A method for determining a patient’s susceptibility to anaphylaxis comprises assaying the activity of platelet activating factor acetylhydrolase activity and comparing the measured activity to a reference value, wherein the level of PAF-AH activity inversely correlates with the susceptibility to anaphylaxis. The system is designed to provide early detection of cardiac events such as acute myocardial infarction or exercise induced myocardial ischemia caused by an increased heart rate or exertion. The photoresist planarization and protection layer is patterned and developed to define at least one fluid feed via location. As a result, strain on a rear portion of a hull that supports a boat propulsion unit is prevented and minimized, while a transmission unit is sufficiently cooled with cooling water. The method is useful for in-situ ion exchange loading of metals for which the adsorbent has a strong affinity.