A method and system for tracking hits of a requested network file includes embedding an instruction within the file that directs the requesting device to transmit an indicator to a processor for counting subsequent to the requesting device receiving the requested file. The DC to DC converter includes a comparator configured to compare a reference signal with a second signal. The invention provides differing valve body components and configurations to provide optimal ink flow for inks of differing viscosities, creating a self-wicking art instrument that resists leakage, splattering, and other undesirable characteristics of known self-contained ink art instruments. The printing system may also include a pressing apparatus positioned adjacent the endless belt. The method and system of the invention includes establishing a multidisciplinary antimicrobial treatment team; obtaining patient data; reviewing patient data for sub-optimal antibiotic regimens and when necessary, conferring if MATT members regarding regimen recommendations; generating reports with recommendations for optimal antibiotic regimens based on the review of the patient data. The precipitated silica product is especially well-adapted for use in dentifrices containing cetylpyridinium chloride, which do not attach to the low surface area silica product in a meaningful level and thus remain available for antimicrobial action.