The observed variations in practice patterns in different regions of the country is the result of all of the following except one.
a. Patients often prefer a number of different options to treat the same illness and physicians are willing to accommodate these differences.
b. The observed variations are due to scientific uncertainty associated with diagnosis and treatment.
c. There are many alternative treatment options available for most ailments.
d. Practice variations are due to differences in demographics and disease incidence across regions.
e. Medical training varies across the country depending on where the physician was trained, and most physicians' practices tend to be in the same regions.
d. Practice variations are due to differences in demographics and disease incidence across regions.
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