2173-575154112018NovArch Bronconeumol (Engl Ed)Comparative Study Between Tuberculosis Incidence Rates in the Two Largest Metropolitan Areas of Portugal.595596595-59610.1016/j.arbres.2018.05.003S0300-2896(18)30192-3FelgueirasMafaldaMService of Clinical Pathology, Centro Hospitalar da Cova da Beira, Covilhã, Portugal. Electronic address: mfelgueiras@gmail.com.CerqueiraSaraSDepartment of Mathematics, Faculty of Science, Porto, Portugal.GaioRitaRDepartment of Mathematics, Faculty of Science, Porto, Portugal; Centre of Mathematics, University of Porto, Porto, Portugal.FelgueirasÓscarÓDepartment of Mathematics, Faculty of Science, Porto, Portugal; Centre of Mathematics, University of Porto, Porto, Portugal.DuarteRaquelRPulmonary Department, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal; Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal; EPIUnit, Institute of Public Health, University of Porto, Porto, Portugal.engspaLetterComment20180606