Medical writing entails expressing a collection of data and ideas in a clear, concise, plausible, absolute, and compelling manner. These medical or scientific information documents should be created with a specific audience in mind, such as patients, doctors or physicians, the general public, or regulatory officials. The writer must understand the field in which they are writing and their audience so that they can provide relevant information in a useful and understandable way. The process of preparing these documents includes analysis of the market, topic selection, data gathering, drafting, editing, proofreading, and publishing. Although not all writers have expertise in each of these areas, it is important for them to work with experts when necessary. For example, a medical writer may be asked by a physician to review existing patient education materials for clarity and ease of understanding before they are published. The writer would then revise the material according to suggestions made by the physician. Other examples of specializations within medical writing include: drug discovery/development (writing up-to-date reviews of available drugs); clinical trials management (drafting protocols for studies; analyzing data from studies that have been completed); health technology assessment (reviewing new medical devices; recommending appropriate procedures based on evidence); policy documentation (preparing reports about proposed changes to Medicare regulations; other government agency reports); and marketing communications (creating product brochures; producing advertisements). Medical writing is an increasingly important part of modern medicine.