Fig. 1From: Prevalence and burden of orthopaedic implantable-device infections in Italy: a hospital-based national studyMethodological overview. ICD-9-CM: International Classification of Diseases - 9th revision - Clinical Modification. HDF(s): Hospital discharge form(s). SSN: Servizio Sanitario Nazionale. DRG(s): Diagnosis-related group(s). LOS: Length of Stay. Research Q.: Research QuestionBack to article page