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.
Wevers RA, Engelke U, Wendel U, de Jong JG, Gabreëls FJ, Heerschap A.Wevers RA, et al. Among authors: heerschap a.Clin Chem. 1995 May;41(5):744-51.Clin Chem. 1995.PMID: 7729054
Heerschap A, van den Berg PP.Heerschap A, et al.Am J Obstet Gynecol. 1994 Apr;170(4):1150-1. doi: 10.1016/s0002-9378(94)70111-3.Am J Obstet Gynecol. 1994.PMID: 8166200
Massuger LF, van Vierzen PB, Engelke U, Heerschap A, Wevers R.Massuger LF, et al. Among authors: heerschap a.Cancer. 1998 May 1;82(9):1726-30. doi: 10.1002/(sici)1097-0142(19980501)82:9<1731::aid-cncr20>3.0.co;2-4.Cancer. 1998.PMID: 9576295Clinical Trial.