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Van Alphen L, Bol P, Kok ML, Geelen-Van Den Broek L.Van Alphen L, et al. Among authors: bol p.J Med Microbiol. 1991 Jun;34(6):313-6. doi: 10.1099/00222615-34-6-313.J Med Microbiol. 1991.PMID: 2056515
van Alphen L, van Dam A, Bol P, Spanjaard L, Zanen HC.van Alphen L, et al. Among authors: bol p.J Infect. 1987 Jul;15(1):95-101. doi: 10.1016/s0163-4453(87)91626-4.J Infect. 1987.PMID: 3499469
Takala AK, van Alphen L, Eskola J, Palmgren J, Bol P, Mäkelä PH.Takala AK, et al. Among authors: bol p.Lancet. 1987 Sep 19;2(8560):647-50. doi: 10.1016/s0140-6736(87)92440-8.Lancet. 1987.PMID: 2887940
Spanjaard L, Bol P.Spanjaard L, et al. Among authors: bol p.Ned Tijdschr Geneeskd. 1990 Mar 24;134(12):575-7.Ned Tijdschr Geneeskd. 1990.PMID: 2320157Dutch.No abstract available.
Martens LL, ten Velden GH, Bol P.Martens LL, et al. Among authors: bol p.Ned Tijdschr Geneeskd. 1991 Jan 5;135(1):16-20.Ned Tijdschr Geneeskd. 1991.PMID: 1899290Dutch.