title: The unexpected: its significance in biological research.
mesh_terms: D000818:Animals; D001695:Biology; D001777:Blood Coagulation; D001790:Blood Physiological Phenomena; D001803:Blood Transfusion; D002415:Cats; D004285:Dogs; D008851:Micropore Filters; D010974:Platelet Aggregation; D012107:Research Design