To secure an optical lens over an optoelectronic transmitter or receiver, it is proposed to use a UV-initiated or photoinitiated, cationically curing epoxy resin, by means of which the bonded joint can be set and thereby fixed in a few seconds. The network system can comprise a system comprising a memory for storing computer executable instructions and a processing unit for accessing the memory and executing the computer executable instructions. The disclosed methods further include selecting a therapy for the subject based on the amount of DSG-3 protein in the sample from the subject.