John B. Marshall is a Gastroenterology researcher affiliated with University of Missouri. OpenAlex indexes 175 publications with 5,554 citations (h-index 35).
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Payments and prescribing
We show industry payments and prescribing only where a government publishes them as reusable data for individual physicians, which today is the United States. Neither is available for this profile's country.
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A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments, shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”