thrombosis article 18 human 18 controlled study 12 male 12 priority journal 12 Humans 10 female 10 Male 8 adult 8 Female 6 aged 6 major clinical study 6 Adenosine Diphosphate 4 Adolescent 4 Adult 4 Aged 4 Aged, 80 and over 4 Animals 4 Anticoagulants 4 Antithrombin III 4 Child 4 Homocysteine 4 Platelet Aggregation 4 Polysaccharides 4 Protein C 4 Thrombosis 4 acetylsalicylic acid 4 adolescent 4 animal experiment 4