This research group's published pilot study reported that nearly 12% of prescribed doses of pharmacologic VTE prophylaxis are not administered and almost 60% of missed doses are due to patient or family member refusal. Fanikos et al found that 44% of missed doses of VTE prophylaxis were due to patient refusal. In a survey of 500 recently hospitalized patients, the National Blood Clot Alliance found that only 28% and 15% respectively had basic knowledge of deep venous thrombosis (DVT) or pulmonary embolism (PE) despite the fact that 15% of participants had a history and 43% had a family history of either condition.