PubMed search interface. The advanced search options are available in the upper section. Besides search field descriptions (title, abstract and text word), several filters are available: publication types, age criteria, humans/animal and Clinical Queries filters. The PubMed search result for hypertension is shown in the lower section.
Hoogendam et al. BMC Medical Informatics and Decision Making 2008 8:42 doi:10.1186/1472-6947-8-42