In Memoriam: Richard W. McCallum, MD, FACP, FRACP (AUST), FACG—A Legend in Gastric Physiology and Pathophysiology

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Dr. McCallum was a pioneer in gastric physiology, revolutionizing treatment for patients with gastroparesis through innovative research.
He initiated the first gastric electrical stimulation (GES) system for gastroparesis, benefiting tens of thousands of patients since its launch.
As the founding member of the NIH/NIDDK Gastroparesis Clinical Research Consortium, he led numerous clinical trials, advancing our understanding of GI motility.
His contributions earned him multiple prestigious awards, highlighting his significant impact on gastroenterology and patient care.

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A tribute to Richard W. McCallum, a pioneer in gastroenterology and gastric physiology, whose work in gastroparesis transformed patient care.

Rao et al. (2025) studied this question.

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A tribute to Richard W. McCallum, a pioneer in gastroenterology and gastric physiology, whose work in gastroparesis transformed patient care.