People

Director and collaborators.

CESOR is defined through its director and active collaborators. Profiles are concise and role-based.

Last updated: 2026-05-04

Director

Laboratory leadership.

Gary A. Bass, MD, MSc, MBA, PhD, FEBS (Emergency Surgery)

Assistant Professor of Surgery and Assistant Professor of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania

Gary A. Bass directs CESOR and leads its work in emergency surgery outcomes research, multicenter platform design, causal inference, and implementation-focused study development.

Collaborators

Active collaboration across methods, platforms, and acute care research.

Profiles are intentionally brief and are not presented as a ranked internal hierarchy.

Lewis J. Kaplan, MD, FACS, FCCM, FCCP

Perelman School of Medicine, University of Pennsylvania

Trauma and surgical critical care collaborator with long-standing involvement in acute care outcomes research.

Dane Isenberg, PhD

Biostatistics and causal inference

Methodologic collaborator contributing causal inference expertise relevant to target trial design and observational analysis.

Caoimhe C. Duffy, MD, MSc, FCAI

Perelman School of Medicine, University of Pennsylvania

Collaborator in perioperative safety science, airway research, and implementation-relevant design.

Niels D. Martin, MD

Perelman School of Medicine, University of Pennsylvania

Senior acute care surgery collaborator with expertise in trauma systems, emergency surgery, and program development.

Matteo Maria Cimino, MD

Emergency Surgery Unit, Milan

Collaborator in multinational emergency surgery cohort work with relevance to acute abdominal disease platforms.

Hayato Kurihara, MD, FACS, FEBS (Emergency Surgery)

Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan

Emergency surgery collaborator involved in multinational observational platform development.

Matthew J. Lee, MBChB, MRCS, PhD

University of Birmingham

Academic colorectal surgeon and outcomes researcher contributing to emergency abdominal pathology platforms.

Isidro Martínez-Casas, MD, PhD, FEBS (Emergency Surgery)

Hospital Universitario Virgen del Rocío, Seville

Trauma and emergency surgery collaborator involved in multinational acute care cohort studies.

Enrico Marrano, MD

Acute care surgery collaborator.

Stefano P. B. Cioffi, MD, PhD

Emergency surgery and collaborative research contributor.

Ana María González-Castillo, MD, PhD

Emergency abdominal pathology and outcomes research collaborator.

Núria Lluís, MD, PhD

Research fellow contributor in surgical outcomes work.

Kathleen Davin, MD

Trainee contributor within collaborative emergency surgery research.

Gabriele Bellio, MD

Acute care surgery and observational cohort collaborator.