Melo V, Baía L, Rita Gaio A, Duarte R
Pulmonology Department, Centro Hospitalar Tondela-Viseu, Portugal.
Faculty of Sciences, Department of Mathematics, University of Porto, Portugal.
Rev Port Pneumol (2006). 2016 Nov-Dec;22(6):355-357. doi: 10.1016/j.rppnen.2016.07.005. Epub 2016 Sep 4.