Methods and apparatuses for generating error correction codes of a data block are disclosed. Transfer file and signal includes signature identifying format of file, header containing information about various parts of transfer file, asset metadata describing technical details about media content, media content that is capable of being displayed to user by client computer system using media player program, and user metadata that is capable of being displayed to user. Electronic assemblies including circuit boards and electrical components mounted thereto are also described. The proximal end of the catheter is operatively coupled to the reservoir.