A method has been developed to detect the levels of apolipoproteins A-1 and B in saliva, which is correlated with the levels of HDL and LDL in serum, respectively. Pharmaceutical compositions comprising the compounds of the invention and methods of preparing the compounds of the invention are also disclosed. The single level memory module includes a first data bus and at least one single level cell flash memory. Alternatively, plasma treatment is performed on the surface of the interlayer insulating film on the TFT for surface modification. The method processes the data with the first processing module based upon a recipient system and its second data stream type. A portion of the stacked layer uncovered by the hard mask pattern is removed using the hard mask pattern and the stress buffer layer as an etch mask, thereby forming a first resultant structure.