System and methods for a connection proxy server are described. An elevator control system readies at least two of the elevator cars in the hoistway in an area of two mutually adjacent entrance areas. In certain preferred embodiments the methods include immunopurifying the dihydroxyvitamin D metabolites prior to mass spectrometry. 95 in each of the magnetic tracks, and magnetization information is recorded in the width direction of each magnetic track. For this reason, reduction in the yield and reliability due to defects occurring in the photolithography and etch processes is prevented.