Using tablet computers compared to interactive voice response to improve subject recruitment in osteoporosis pragmatic clinical trials: feasibility, satisfaction, and sample size 由 Mudano AS, Gary LC, Oliveira AL, Melton M, Wright NC, Curtis JR, Delzell E, Harrington TM, Kilgore ML, Lewis CE,Singh JA, Warriner AH, Pace WD, Saag KG

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