Clinicians today have access to a rich selection of knowledge sources, including those that are publicly available, for example, PubMed and MedlinePlus from the National Library of Medicine (NLM), the Centers for Disease Control and Vaccine Prevention (CDC) and international travel information, the Agency for Healthcare Research and Quality (AHRQ) National Guideline Clearinghouse and those produced by commercial providers such as UpToDate, Micromedex and eTextbooks, all accessible from any web browser. at any time. Some EHR systems are proactive and present short nuggets of information in paragraph form adjacent to the clinician's chosen order item. EHRs can also extract literature, manuals, or other sources of information relevant to a particular clinical situation via an Info button and present that information to the clinician on the fly (Del Fiol et al. 2012), an approach that is encouraged by CMS MU2 regulations (Final Rule: CMS 2012). Search for queries. Eknygos.lsmuni.it: The most effective time to provide access to knowledge resources is when decisions or orders are being considered by the clinician..