Amir Khalil, Zaidi S B H
Frequency of GERD in subjects with COPD: an experience from PNS Shifa.
Pak J Chest Med Oct - Dec 2008;14(4):21-6.

Zafar Lqbal, Ziaullah, Anita Basit, Mohammad Yousaf Khan, Arshad Javaid, Zafar lqbal
Changes in arterial blood gases and respiratory rate before and after non invasive positive pressure ventilation in acute exacerbation of COPD.
Pak J Chest Med Jul - Sep 2008;14(3):3-8.

Muhammad Irfan
Pulmonary hypertension: an underestimated disease in developing world.
Pak J Chest Med Jul - Sep 2008;14(3):1-2.

Manabendra Biswas, Kamrul Alam, Zillur Rahman, Bar Choudhury G M Akbar, Akm Razzak, Shafiqul Ahsan, Nabi Alam Khan
Spontaneous pneumothorax secondary to COPD.
Professional Med J Apr - Jun 2007;14(2):255-62.

Syed Hafeezul Hassan, Sikandar Ali Sheikh, Farooq Munfeat
Spirometry and vital parameters in assessment of asthma and COPD in rural population of Karachi.
Pak J Chest Med Jan - Mar 2007;13(1):15-20.

Rukhsana Javed Farooqi, Javed Iqbal Farooqi, Masoodur Rehman, Hameed Ahmad, Farooq Ahmad, Sultan Gul
Outcome after injection sclerotherapy for esophageal variceal bleeding in patients with liver cirrhosis & COPD.
J Postgrad Med Inst Jan - Mar 2005;19(1):76-80.

Rizvi N, Mehmood N, Hussain N
Role of Bi-pap in acute respiratory failure due to acute exacerbation of COPD.
J Pak Med Assoc Dec 2001;51(12):414-7.