text: On wikidoc, a chapter is a collection of smaller chapters called<unk> .  For instance, the disease pericarditis is a chapter composed of multiple<unk>  such as pericarditis overview, pericarditis pathophysiology, pericarditis treatment etc.<unk>  allow users to access the content they are looking for more efficiently when browsing wikidoc.  It also maintains completeness and consistency of Wikidoc pages. <unk> ng on wikidoc is usually a part of our main mission of creating a new page for a disease.
option_0: Microchapters project
option_1: Resident survival guide project
option_2: Clinical trials terminology
option_3: Clinical engineering
option_4: Differential diagnosis project
option_5: Semiconductor device fabrication
option_6: Crowdiagnosis project template
option_7: Operationalizing Clinical Trials