- Correspondence to Dr Carrie H Colla, The Dartmouth Institute for Health Policy & Clinical Practice, Geisel School of Medicine at Dartmouth, 35 Centerra Parkway, Lebanon, NH 03766, USA;
- Received April 2, 2014
- Revised June 6, 2014
- Accepted July 10, 2014
- First published August 5, 2014.
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