RT Journal Article SR Electronic T1 Exertional dyspnea in a 50-year-old man JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1439 OP 1440 VO 27 IS 9 A1 Amita Singh A1 Jaya Kala A1 Sandeep Sahay A1 Ashok Shah YR 2006 UL http://smj.org.sa/content/27/9/1439.abstract