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0193841X0102500504
0193841X0102500504
http://dx.doi.org/10.1177/0193841X0102500504
Do participation rates change when active consent procedures replace passive consent.
P356
Q52934797-32B27018-88BC-4728-A00A-CD86028CB79E
P356
0193841X0102500504
http://dx.doi.org/10.1177/0193841X0102500504