GretchenS.(Schaef)JohnsMD

Pathology • Jacksonville, FL

Blood Banking & Transfusion Medicine, Transplantation Immunology, Anatomic Pathology, Clinical Pathology

Physician

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Office
4500 San Pablo Rd S
Jacksonville, FL 32224
Phone+1 904-953-2000

Education & Training

Emory University School of MedicineFellowship, Blood Banking/Transfusion Medicine, 2001 - 2002
SSM Health/Saint Louis University School of MedicineResidency, Pathology-Anatomic and Clinical, 1997 - 2001
SSM Health/Saint Louis University School of MedicineResidency, Radiology-Diagnostic, 1996 - 1996
University of Florida College of MedicineInternship, Transitional Year, 1995 - 1996
Saint Louis University School of MedicineClass of 1995

Certifications & Licensure

FL State Medical License 2008 - 2025
GA State Medical License 2001 - 2025
MO State Medical License 1997 - 2025
American Board of Pathology Clinical Pathology
American Board of Pathology Blood Banking/Transfusion Medicine

Publications & Presentations

PubMed

42 citations
Indexes of von Willebrand factor as biomarkers of aortic stenosis severity (from the Biomarkers of Aortic Stenosis Severity [BASS] study).
Joseph L. Blackshear, Ewa M. Wysokinska, Robert E. Safford, Colleen S. Thomas, Mark E. Stark
The American Journal of Cardiology. 2013-02-01
53 citations
Shear stress-associated acquired von Willebrand syndrome in patients with mitral regurgitation.
Joseph L. Blackshear, Ewa M. Wysokinska, Robert E. Safford, Colleen S. Thomas, Brian P. Shapiro
Journal of Thrombosis and Haemostasis. 2014-12-01
9 citations
A Case of Acute Pulmonary Embolus after mRNA SARS-CoV-2 Immunization.
Nathaniel E. Wiest, Gretchen S. Johns, E. B. Edwards
Vaccines. 2021-08-14

Lectures

Identification of a Novel Heterozygous Mutation (c.2213T>G;p.Leu738Arg) in Platelet Glycoprotein ITGB3 gene in a Patient with Glanzmann’s Thrombasthenia
2018 ASH Annual Meeting - San Diego, CA - 12/1/2018