Post-exposure rate of tuberculosis infection among health care workers measured with tuberculin skin test conversion after unprotected exposure to patients with pulmonary tuberculosis: 6-year experience in an Italian teaching hospital. - Muzzi, Alba; Seminari, Elena; Feletti, Tiziana; Scudeller, Luigia; Marone, Piero; Tinelli, Carmine; Minoli, Lorenzo; Marena, Carlo; Mangiarotti, Patrizia; Strosselli, Maurizio (BMC Infectious Diseases, 2014)