Comment on

• The duration of oral anticoagulant therapy after a second episode of venous thromboembolism. The Duration of Anticoagulation Trial Study Group.

  Schulman S, Granqvist S, Holmström M, Carlsson A, Lindmarker P, Nicol P, Eklund SG, Nordlander S, Lärfars G, Leijd B, Linder O, Loogna E. Schulman S, et al. N Engl J Med. 1997 Feb 6;336(6):393-8. doi: 10.1056/NEJM199702063360601. N Engl J Med. 1997. PMID: 9010144 Clinical Trial.