| http://www.w3.org/ns/prov#value | - They do not include:The cost of overhead related to these interactions, such as office space or telephone, fax, and computer expenses;Time spent by the one-third of U.S. physicians (and their staff) who are not in office-based practice; orTime spent by nurse practitioners or physician assistants.Furthermore, these estimates exclude the costs to payers of interacting with physician practices and th
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