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Takala AK, Santosham M, Almeido-Hill J, Wolff M, Newcomer W, Reid R, Käyhty H, Esko E, Mäkelä PH.Takala AK, et al. Among authors: makela ph.Pediatr Infect Dis J. 1993 Jul;12(7):593-9. doi: 10.1097/00006454-199307000-00010.Pediatr Infect Dis J. 1993.PMID: 8346004
Siitonen A, Takala A, Ratiner YA, Pere A, Mäkelä PH.Siitonen A, et al. Among authors: makela ph.Pediatr Infect Dis J. 1993 Jul;12(7):606-12. doi: 10.1097/00006454-199307000-00012.Pediatr Infect Dis J. 1993.PMID: 8102199
Takala AK, Meurman O, Kleemola M, Kela E, Rönnberg PR, Eskola J, Mäkelä PH.Takala AK, et al. Among authors: makela ph.Pediatr Infect Dis J. 1993 Mar;12(3):189-95. doi: 10.1097/00006454-199303000-00003.Pediatr Infect Dis J. 1993.PMID: 8451094