- PMID 23384743.
Stegeman BH, de
Bastos M,
Rosendaal FR, van
Hylckama Vlieg A,
Helmerhorst FM,
Stijnen T,
Dekkers OM (September 2013). "Different
combined oral...
- 2011: 260482. doi:10.1155/2011/260482. PMC 3169834. PMID 21994818.
Helmerhorst HJ,
Schultz MJ, van der
Voort PH, de
Jonge E, van
Westerloo DJ (August...
- whonamedit.com
Piludu M,
Lantini MS,
Cossu M,
Piras M,
Oppenheim FG,
Helmerhorst EJ,
Siqueira W, Hand AR (November 2006). "Salivary
histatins in human...
- 1007/978-3-319-73269-5. ISBN 978-3-319-73268-8. S2CID 46891351.
Pegels JG,
Helmerhorst FM, van
Leeuwen EF, van de Plas-van
Dalen C,
Engelfriet CP, von dem Borne...
- S2CID 36136756.
Kemmeren JM,
Tanis BC, van den
Bosch MA,
Bollen EL,
Helmerhorst FM, van der
Graaf Y, et al. (May 2002). "Risk of
Arterial Thrombosis...
- doi:10.1056/NEJMc0807104. PMID 18971502. S2CID 205040478.
Roach RE,
Helmerhorst FM,
Lijfering WM,
Stijnen T,
Algra A,
Dekkers OM (August 2015). "Combined...
- PMID 21359483.
Stegeman BH, de
Bastos M,
Rosendaal FR, van
Hylckama Vlieg A,
Helmerhorst FM,
Stijnen T,
Dekkers OM (September 2013). "Different
combined oral...
- 2012, p. 157
Piludu M,
Lantini MS,
Cossu M,
Piras M,
Oppenheim FG,
Helmerhorst EJ, et al. (November 2006). "Salivary
histatins in
human deep posterior...
- its
premiere at the
Youth Theatre. The play was
directed by
Michael Helmerhorst and co-adapted with
Henri Overduin as a
cooperation between European...
- 62. PMID 24161307. S2CID 45517684. Lopez,
Laureen M.; Kaptein, Ad A.;
Helmerhorst,
Frans M. (2009-04-15). Lopez,
Laureen M (ed.). "Oral contraceptives...
