Hematologic aspects.
D001778:Blood Coagulation Disorders; D001780:Blood Coagulation Tests; D006470:Hemorrhage / Q000209:etiology / Q000517:prevention & control; D006801:Humans; D013508:Ophthalmologic Surgical Procedures; D010038:Otorhinolaryngologic Diseases / Q000601:surgery*; D011183:Postoperative Complications