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Weerwind PW, Maessen JG, van Tits LJ, Stad RK, Fransen EJ, de Jong DS, Penn OC.Weerwind PW, et al. Among authors: penn oc.J Thorac Cardiovasc Surg. 1995 Dec;110(6):1633-41. doi: 10.1016/S0022-5223(95)70024-2.J Thorac Cardiovasc Surg. 1995.PMID: 8523873Free article.Clinical Trial.
Hoeksel SA, Schreuder JJ, Blom JA, Maessen JG, Penn OC.Hoeksel SA, et al. Among authors: penn oc.Intensive Care Med. 1996 Jul;22(7):688-93. doi: 10.1007/BF01709748.Intensive Care Med. 1996.PMID: 8844236Clinical Trial.
Oei KT, Sie HT, Penn OC, van Engelshoven JM.Oei KT, et al. Among authors: penn oc.Eur J Radiol. 1992 Jul-Aug;15(1):37-9. doi: 10.1016/0720-048x(92)90200-s.Eur J Radiol. 1992.PMID: 1396786
Soliman Hamad MA, van Straten AH, van Zundert AA, ter Woorst JF, Martens EJ, Penn OC.Soliman Hamad MA, et al. Among authors: penn oc.J Card Surg. 2011 Jan;26(1):9-15. doi: 10.1111/j.1540-8191.2010.01161.x. Epub 2010 Nov 14.J Card Surg. 2011.PMID: 21073534
van Belle AF, Wesseling GJ, Penn OC, Wouters EF.van Belle AF, et al. Among authors: penn oc.Respir Med. 1992 May;86(3):195-9. doi: 10.1016/s0954-6111(06)80054-5.Respir Med. 1992.PMID: 1620905
Lucas CM, Cheriex EC, van der Veen FH, Habets J, van der Nagel T, Penn OC, Wellens HJ.Lucas CM, et al. Among authors: penn oc.Cardiovasc Res. 1992 Aug;26(8):804-9. doi: 10.1093/cvr/26.8.804.Cardiovasc Res. 1992.PMID: 1451156