The term natural history group refers to subjects in a drug trial that receive no treatment of any kind and whose illness is, as a consequence, left to run its "natural" course. The term stems from the natural history of an illness, which is the course and outcome of that illness in the absence of treatment.
Read more about Natural History Group: First Usage, Third Arm
Famous quotes containing the words natural history, natural, history and/or group:
“Let us not underrate the value of a fact; it will one day flower in a truth. It is astonishing how few facts of importance are added in a century to the natural history of any animal. The natural history of man himself is still being gradually written.”
—Henry David Thoreau (1817–1862)
“There must be a world revolution which puts an end to all materialistic conditions hindering woman from performing her natural role in life and driving her to carry out man’s duties in order to be equal in rights.”
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“No group and no government can properly prescribe precisely what should constitute the body of knowledge with which true education is concerned.”
—Franklin D. Roosevelt (1882–1945)