[1] Univ Politecn Marche, Fac Med & Surg, Sch Hyg & Prevent Med, Dept Biomed Sci & Publ Hlth, Ancona, Italy
[2] Macerata Hosp, Dept Surg, Macerata, Italy
[3] Univ Porto ISPUP, Inst Saude Publ, Epidemiol Res Unit EPIUnit, Porto, Portugal
[4] Univ Porto, Fac Med, Dept Ciencias Saude Publ & Forenses & Educ Med, Porto, Portugal
[5] Univ Miami, Miller Sch Med, Infect Prevent & Antimicrobial Stewardship Jackso, Miami, FL 33136 USA
[6] Papa Giovanni XXIII Hosp, Gen Surg Dept, Bergamo, Italy
[7] Ctr Hosp Sao Joao, Ctr Epidemiol Hosp, Unit Prevent & Control Infect & Antimicrobial Res, Porto, Portugal
[8] Ctr Hosp Sao Joao, Dept Gen Surg, Porto, Portugal
[9] Univ Brescia, Dept Clin & Expt Sci, Brescia, Italy
[10] Ctr Hosp Sao Joao, Dept Emergency & Intens Care, Porto, Portugal
[11] Univ Porto, Fac Med, Dept Med, Porto, Portugal
[12] Maggiore Hosp, Dept Emergency Surg, Parma, Italy
[13] Ctr Hosp Sao Joao, Ctr Epidemiol Hosp, Porto, Portugal