The American Journal of Clinical Nutrition

Journal, The American Society for Nutrition, Cary, USA

First Principles of Gastroenterology

Book, A. B. R. Thomson, CAPstone (Canadian Academic Publishers Ltd), North Mankato, USA, 2012

Osteoporosis and Bone Physiology

Susan Ott, University of Washington, Seattle, USA

Fluid Resuscitation

Book, National Academies of Sciences, Washington, USA, 1999

Osteoporosis Canada

Osteoporosis Canada, Toronto, Canada

Bratislava Medical Journal

Journal, Faculty of Medicine, Bratislava, Slovakia

The Internet Journal of Cardiovascular Research

Internet Scientific Publications LLC., Sugar Land, USA

British Medical Journal

Journal, British Medical Journal, London, UK

Internal Medicine Journals

Emedicine.medscape  WebMD LLC, New York, USA

The Lancet

Journal, Elsevier Limited, London, UK, free registration needed

Gastroenterology Articles

Emedicine.medscape  WebMD LLC, New York, USA

The Nephron Information Center

S. Z. Fadem, The Houston Kidney Center Integrated Service Network, Houston, Texas, USA

Canadian Medical Association Journal

Journal, Canadian Medical Association Journal, Ottawa, Canada

Gastrointestinal Disorders

Merck Manual, Merck Sharp & Dohme Corp., Kenilworth, USA

The New England Journal of Medicine

 Journal, Massachusetts Medical Society, Waltham, MA, USA

AAA Gastrolab

Petr Kocna, VFN a I. LF KU Praha, Czech Republic, in Czech

Capsule Endoscopy

Medtronic, Minneapolis, USA

Easy Auscultation

MedEdu LLC, Westborough, USA

Atlas of Gastrointestinal Endoscopy

David M. Martin

Cardiac Physical Examination

Ottawa, Ontario, Canada