TY  - BOOK
AU  - Vasudevan Vishnu Au.
AU  -  Giri Subhash Gu.
AU  - University of Delhi. Faculty of Medical Science. Department of General Medicine
ED  - University of Delhi. Faculty of Medical Science. Department of General Medicine
TI  - To assess the efficacy of sildenafil in improving the exercise capasity and quality of life in copd patients with secondary pulmonary hypertension :  A randomized, placebo controlled, double blinded study
PY  - 2013///
KW  - MEDICINE
ER  -