A Comparison of Six Weeks with Six Months of Oral Anticoagulant Therapy after a First Episode of Venous ThromboembolismSam Schulman, Enno Loogna, Ann-Sofie Rhedin et al.|New England Journal of Medicine|1995Cited by 940
The Duration of Oral Anticoagulant Therapy after a Second Episode of Venous ThromboembolismSam Schulman, Jonas Boberg, Sune Nordlander et al.|New England Journal of Medicine|1997Cited by 611