Hardeep Singh Puri, India's ambassador to the U.N.

WSJ: U.N. Peacekeepers at War in the Congo

Hardeep Singh, a researcher at Michael E.

WSJ: Adding Up Diagnosis Errors

Dr. Hardeep Singh, who led the new study at the Houston VA Health Services Research and Development Center of Excellence, added that most of the missed diagnoses were traced back to the office visit and the doctor not getting an accurate patient history, doing a full exam or ordering the correct tests.

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