Pakistan Journal of Medical Sciences It is a peer reviewed medical journal published regularly since 1984. It was previously known as quarterly "SPECIALIST" till December 31st 1999. It publishes original research articles, review articles, current practices, short communications & case reports. It attracts manuscripts not only from within Pakistan but also from over fifty countries from abroad. Copies of PJMS are sent to all the import medical libraries all over Pakistan and overseas particularly in South East Asia and Asia Pacific besides WHO EMRO Region countries. Eminent members of the medical profession at home and abroad regularly contribute their write-ups, manuscripts in our publications. We pursue an independent editorial policy, which allows an opportunity to the healthcare professionals to express their views without any fear or favour. That is why many opinion makers among the medical and pharmaceutical profession use this publication to communicate their viewpoint. Our office Address: PROFESSIONAL MEDICAL PUBLICATIONS Office # 701, Seventh Floor, Business Center, PECHS, Shahrah-e-Faisal, Karachi-Pakistan. Phones: +92-021-34324732 & +92-021-34324733 Email: pjms@pjms.org.pk