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Testing Prayer is written by Candy Gunther Brown and published by Harvard University Press. It's available with International Standard Book Number or ISBN identification 0674069714 (ISBN 10) and 9780674069718 (ISBN 13).
Drawing on medical records, surveys of prayer recipients, prospective clinical trials, and multiyear follow-up observations and interviews, Brown shows that the widespread perception of prayer’s healing power has demonstrable social effects which can in some cases produce improvements in health that can be scientifically verified.