The Effect of Serum Vitamin D Level in Korean Chronic Obstructive Pulmonary Disease (COPD) Patients
2017 ◽
Vol 5
(2)
◽
pp. 128-136
2019 ◽
Vol 8
(7)
◽
pp. 2268
2016 ◽
Vol 4
(9)
◽
pp. 1872-1878
2018 ◽
Vol 6
(7)
◽
pp. 2396
2019 ◽
Vol 7
(14)
◽
pp. 2298-2304