van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
van Leerdam, ME (2008). "Epidemiology of acute upper gastrointestinal bleeding". Best Practice & Research. Clinical Gastroenterology. 22 (2): 209–24. doi:10.1016/j.bpg.2007.10.011. PMID18346679.
"Bleeding in the Digestive Tract". The National Institute of Diabetes and Digestive and Kidney Diseases. September 17, 2014. Archived from the original on 21 February 2015. Retrieved 6 March 2015.
"Bleeding in the Digestive Tract". The National Institute of Diabetes and Digestive and Kidney Diseases. September 17, 2014. Archived from the original on 21 February 2015. Retrieved 6 March 2015.