John B Sexton*, Robert L Helmreich, Torsten B Neilands, Kathy Rowan, Keryn Vella, James Boyden, Peter R Roberts and Eric J Thomas
* Corresponding author: John B Sexton jsexton2@jhmi.edu
BMC Health Services Research 2006, 6:44 doi:10.1186/1472-6963-6-44
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