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The patients' characteristics and antecedent infections
DD, developmental delay; CSF, cerebrospinal fluid; PCR, polymerase chain reaction.
*Same patients with recurrent events. †Nasopharyngeal aspirates. ‡Nasal swab/CSF. §Stool. ∥Respiratory virus PCR. ¶Respiratory virus culture. **H1N1 real time PCR. ††Rotavirus antigen test.
