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Aaby P, Pedersen IR, Knudsen K, da Silva MC, Mordhorst CH, Helm-Petersen NC, Hansen BS, Thårup J, Poulsen A, Sodemann M, et al.Aaby P, et al.Pediatr Infect Dis J. 1989 Apr;8(4):197-200.Pediatr Infect Dis J. 1989.PMID: 2717273