This invention relates to macrocyclic chelants comprised of one or two heteroatom-containing bridges, compositions containing them and their use in medicine, particularly in diagnostic imaging and radiotherapy. Methods of use and compositions comprising the Lactobacilli of the present invention are also provided. The system and computer readable medium also include utilizing the first ID and second ID to obtain the appropriate data from a database system and to send the appropriate data to the device. The tendon may be integrally molded within the portion of the tubular member. The transistor structure can be characterized as being a vertical field effect transistor having an asymmetric gate.