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Dr. Mark B. Johnson
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Mark B. Johnson
Interventional Radiology
406-863-3500
1600 Hospital Way
Whitefish, MT 59937
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Last Updated: 09/26/2026
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The sentinel loop sign.
The sentinel loop sign.
Journal:
Abdominal radiology (New York)
Published:
April 07, 2018
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Last Updated: 09/26/2026