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Ruuskanen O, Arola M, Heikkinen T, Ziegler T.Ruuskanen O, et al.Pediatr Infect Dis J. 1991 Jun;10(6):425-7. doi: 10.1097/00006454-199106000-00001.Pediatr Infect Dis J. 1991.PMID: 1852537Review.No abstract available.
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Heikkinen T, Ruohola A, Ruuskanen O, Waris M, Uhari M, Hammarström L.Heikkinen T, et al. Among authors: ruuskanen o.Pediatr Infect Dis J. 1998 May;17(5):367-72. doi: 10.1097/00006454-199805000-00004.Pediatr Infect Dis J. 1998.PMID: 9613647Clinical Trial.
Putto-Laurila A, Mertsola J, Ruuskanen O.Putto-Laurila A, et al. Among authors: ruuskanen o.Pediatr Infect Dis J. 1999 Jan;18(1):71-2. doi: 10.1097/00006454-199901000-00019.Pediatr Infect Dis J. 1999.PMID: 9951987No abstract available.