case-control study

  • Drug use and upper gastrointestinal complications in children: a case–control study
    Manuela Bianciotto, Elena Chiappini, Irene Raffaldi, Clara Gabiano, Pier-Angelo Tovo, Sara Sollai, Maurizio de Martino, Francesco Mannelli, Vincenzo Tipo, Roberto Da Cas, Giuseppe Traversa, Francesca Menniti-Ippolito, and the Italian Multicenter Study Group for Drug and Vaccine Safety in Children