An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Heldal M, Sire S, Dale J.Heldal M, et al.Scand Cardiovasc J. 2000;34(1):59-64. doi: 10.1080/14017430050142413.Scand Cardiovasc J. 2000.PMID: 10816062Clinical Trial.
Heldal M, Sire S, Sandvik L, Dale J.Heldal M, et al.Eur Heart J. 1996 Dec;17(12):1821-7. doi: 10.1093/oxfordjournals.eurheartj.a014798.Eur Heart J. 1996.PMID: 8960423
Heldal M, Rootwelt K, Sire S, Dale J.Heldal M, et al.Scand Cardiovasc J. 2000 Jun;34(3):254-60. doi: 10.1080/713783109.Scand Cardiovasc J. 2000.PMID: 10935771Clinical Trial.
Heldal M, Sire S.Heldal M, et al.Eur Heart J. 1994 Oct;15(10):1362-7. doi: 10.1093/oxfordjournals.eurheartj.a060395.Eur Heart J. 1994.PMID: 7821313Clinical Trial.
Gjesdal K, Platou ES, Aass H, Heldal M, Orning OM.Gjesdal K, et al. Among authors: heldal m.Tidsskr Nor Laegeforen. 1995 Nov 30;115(29):3606-11.Tidsskr Nor Laegeforen. 1995.PMID: 8539713Norwegian.