A polyalkylene oxide-modified phospholipid represented by formula defined in the specification, has a monoacyl phospholipid content of not more than 3% by weight and a content of a base having a nitrogen atom of not more than 0. The reflective surface of the bimaterial cantilever undergoes a change between a substantially planar shape and a curved shape upon direct exposure to an agent of interest. The method also includes forming a first gate structure over the first region and a second gate structure over the second region, wherein the first and second gate structures each include a dummy gate. An anticoagulant line introduces anticoagulant into the drawn whole blood.