Authors
Florin Mihălțan
National Institute of Pneumology “Marius Nasta”, Bucharest, Romania
Ruxandra Ulmeanu
National Institute of Pneumology “Marius Nasta”, Bucharest, Romania
© 2020 Florin Mihălțan, Ruxandra Ulmeanu, published by Romanian Society of Pneumology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.