Origin
The Nun Study, begun (officially) in 1986 with funding by the National Institute on Aging, focuses on a group of 678 American Roman Catholic sisters who are members of the School Sisters of Notre Dame. Studying a relatively homogeneous group (no drug use, little or no alcohol, similar housing and reproductive histories, etc.) minimizes the extraneous variables that may confound other similar research.
Read more about this topic: Nun Study
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