1Nelson AL, Sinow RM (1998) Real-time ultrasonographically guided removal of nonpalpable and intramuscular Norplant capsules. Am J Obstet Gynecol 178: 1185-1193.

2Persaud T, Walling M, Geoghegan T, Buckley O, Stunell H, et al. (2008) Ultrasound-guided removal of Implanon devices. Eur Radiol 18: 2582-2585.

3Anderson JM (2000) Multinucleated giant cells. Curr Opin Hemato l7: 40-47.

4Gretzer C, Emanuelsson L, Liljensten E, Thomsen P (2006) The inflammatory cell influx and cytokines changes during transition from acute inflammation to fibrous repair around implanted materials. J Biomater Sci Polym Ed 17: 669-687.

5Luttikhuizen DT, Harmsen MC, Van Luyn MJ (2006) Cellular and molecular dynamics in the foreign body reaction. Tissue Eng 12: 1955-1970.

3Anderson JM (2000) Multinucleated giant cells. Curr Opin Hemato l7: 40-47.

4Gretzer C, Emanuelsson L, Liljensten E, Thomsen P (2006) The inflammatory cell influx and cytokines changes during transition from acute inflammation to fibrous repair around implanted materials. J Biomater Sci Polym Ed 17: 669-687.

5Luttikhuizen DT, Harmsen MC, Van Luyn MJ (2006) Cellular and molecular dynamics in the foreign body reaction. Tissue Eng 12: 1955-1970.

6James P, Trenery J (2006) Ultrasound localisation and removal of non-palpable Implanon implants. Aust N Z J Obstet Gynaecol 46: 225-228.

7Wu Y, Simonovsky FI, Ratner BD, Horbett TA (2005) The role of adsorbed fibrinogen in platelet adhesion to polyurethane surfaces: a comparison of surface hydrophobicity, protein adsorption, monoclonal antibody binding, and platelet adhesion. J Biomed Mater Res A,. 74: 722-738.

8Zdolsek J, Eaton JW, Tang L (2007) Histamine release and fibrinogen adsorption mediate acute inflammatory responses to biomaterial implants in humans. J Transl Med 5: 31.

9Tang L, Jennings TA, Eaton JW (1998) Mast cells mediate acute inflammatory responses to implanted biomaterials. Proc Natl Acad Sci U S A 95: 8841-8846.

7Wu Y, Simonovsky FI, Ratner BD, Horbett TA (2005) The role of adsorbed fibrinogen in platelet adhesion to polyurethane surfaces: a comparison of surface hydrophobicity, protein adsorption, monoclonal antibody binding, and platelet adhesion. J Biomed Mater Res A,. 74: 722-738.

8Zdolsek J, Eaton JW, Tang L (2007) Histamine release and fibrinogen adsorption mediate acute inflammatory responses to biomaterial implants in humans. J Transl Med 5: 31.

9Tang L, Jennings TA, Eaton JW (1998) Mast cells mediate acute inflammatory responses to implanted biomaterials. Proc Natl Acad Sci U S A 95: 8841-8846.

10Anderson JM, Rodriguez A, Chang DT (2008) Foreign body reaction to biomaterials. Semin Immunol 20: 86-100.

11Zhao QH, McNally AK, Rubin KR, Renier M, Wu Y, et al. (1993) Human plasma alpha 2-macroglobulin promotes in vitro oxidative stress cracking of Pellethane 2363-80A: in vivo and in vitro correlations. J Biomed Mater Res 27: 379-388.

12Kao WJ, Zhao QH, Hiltner A, Anderson JM (1994) Theoretical analysis of in vivo macrophage adhesion and foreign body giant cell formation on polydimethylsiloxane, low density polyethylene, and polyetherurethanes. J Biomed Mater Res 28:73-79.

13Smith A, Reuter S (2002) An assessment of the use of Implanon in three community services. J Fam Plann Reprod Health Care28: 193-196.

14Kelleher S, Turner L, Howe C, Conway AJ, Handelsman DJ (1999) Extrusion of testosterone pellets: a randomized controlled clinical study. Clin Endocrinol (Oxf) 51: 469-471.

15 Handelsman DJ, Mackey MA, Chris Howe, Leo Turner, Conway AJ (1997) An analysis of testosterone implants for androgen replacement therapy. Clin Endocrinol (Oxf) 47: 311-316.