TY - JOUR AU - Offeddu, V; Yung, C F; Low, M SF; Tam, C C TI - Effectiveness of masks and respirators against respiratory infections in healthcare workers: a systematic review and meta-analysis JO - Clin Infect Dis IS - 11 VL - 65 PY - 2017 DO - 10.1093/cid/cix681 L3 - PubMed-ID: 29140516 SP - 1934 EP - 1942 ER -