A study limitations section that describes systematic error introduced into sampling or testing by selecting or encouraging one outcome or answer over others.

DOI: 10.1097/PRS.0b013e3181de24bc

study bias section

http://purl.obolibrary.org/obo/IAO_0000120

ONE ontology

PERSON: Jie Zheng

PERSON: Chen Yang

https://github.com/information-artifact-ontology/IAO/issues/235