Sildenafil for Chronic Obstructive Pulmonary Disease: A Randomized Crossover Trial
2012 ◽
Vol 9
(3)
◽
pp. 268-275
◽
2019 ◽
Vol 199
(9)
◽
pp. 1086-1096
◽
2013 ◽
Vol 11
(4)
◽
pp. 401-406
◽
2018 ◽
Vol 15
(4)
◽
pp. 432-439
◽
2016 ◽
Vol 13
(3)
◽
pp. 256-263
◽
2014 ◽
Vol 11
(5)
◽
pp. 823-825
◽
2013 ◽
Vol 72
(OCE3)
◽