Editing Bleeding (section)

====World Health Organization====
The [[World Health Organization]] made a standardized grading scale to measure the severity of bleeding.<ref name="pmid17043016">{{cite journal | vauthors = Webert K, Cook RJ, Sigouin CS, Rebulla P, Heddle NM | title = The risk of bleeding in thrombocytopenic patients with acute myeloid leukemia | journal = Haematologica | volume = 91 | issue = 11 | pages = 1530–37 | date = November 2006 | pmid = 17043016 }}</ref>

{| class ="wikitable"
|-
| Grade 0
| no bleeding;
|-
| Grade 1
| [[petechial]] bleeding;
|-
| Grade 2
| mild blood loss (clinically significant);
|-
| Grade 3
| gross blood loss, requires transfusion (severe);
|-
| Grade 4
| debilitating blood loss, retinal or cerebral associated with fatality
|}