A system and method are provided for sharing data among a plurality of users. In order to provide an improved lightweight component which can be produced in a more simple manner using fewer working steps and therefore more cost-effectively and in which, in an advantageous manner, a duct can be integrated, it is proposed that the base body is lined on the inside with plastic in order to form duct walls consisting of plastic. The handset is connected in communication with the control process, identified, and provisioned. Also provided are methods of using the antibodies and antagonists to inhibit tumor angiogenesis and thus tumor growth, inflammation, diabetic retinopathy, rheumatoid arthritis, and psoriasis.