Dr. Callahan's Experience
Research training, expertise and qualifications
- Critical Care Medicine
- Critical Care Medicine, 1991
- Internal Medicine, 1988
- Pulmonary Disease, 1990
Procedures Dr. Callahan Performs
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Conditions Dr. Callahan Treats
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Background Check for Dr. Callahan
Awards & Recognitions
Education & Training
Languages Spoken by Dr. Callahan & Staff