ACKNOWLEDGEMENT TO REVIEWERS The Editorial team of JDUHS greatfully acknowledges the contribution of the following honorable reviewers who helped and guided to improving the quality of the manuscripts published/evaluated in the year 2011. Abdul Samad Khan M. Iqbal Afridi Department of Dental Materials, Interdisciplinary Head Department of Psychiatry, JPMC, Karachi Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Lahore Mehnaaz Roohi Associate Professor, Department of Obstetrics & Ahmed Usaid Qureshi Gynaecology, Punjab Medical College Editor, The Department of Paediatrics Medicine, The Children Professional Medical Journal, Faisalabad. Hospital and Institute of Child Health, Lahore Mrs. Talat Naz Ameer Ahmed Assistant Professor, Department of Obstetrics and Department of Paediatrics, Quaid-i-Azam Medical Gynaecolgy, PGMI, Hayatabad, Medical Complex College, Bahawal Victoria Hospital, Bahawalpur Peshawar. Arshalooz Jamila RahmanÊ Muhammad Afzal Kiani Assistant Professor, Department of Paediatrics and Professor of Physical Medicine & Rehabilitiation, Child Health, Division of Women and Child Health, Margalla Institute of Health Sciences, Rawalpindi, Aga Khan University, Karachi Cantt Ayesha Mehnaz Muhammad Mustahsen Ur Rehman Professor of Paediatric Unit III Civil Hospital, Karachi Deputy Dean, Dental Faculty, Ajman University of Science & Technology, Ajman, United Arab Emirates Ayesha Muquim Quraishy Department of Psychiatry, LNH, Karachi Muhammad Riaz Ahmed Department of Statistics, G C University, Lahore Bilal Ahmed Department of Prosthodontics & Oral Implantology, Muhammad Saaiq University of Faisalabad, Faisalabad Department of Plastic Surgery, PIMS, Islamabad Champa Sushel Muhammad Sajjad Ashraf Department of Surgery, Isra University, Hyderabad Assistant Professor, Department of Paediatric Surgery, Dow University of Health Sciences, Karachi Farhan Vakani Department of Continuing Professional Education, Muhammad Umair Dastgir Bhatti Aga Khan University, Karachi Head Department of Periodentology, Faculty of Dentistry, University of Lahore Farhat Kzmi Head Department of Oral Pathology, The University Muhammad Zahid, of Lahore, Lahore Head Dept. of Pharmacology, KEMU Lahore Javed I Kazi Muhammad Mubarak Consultant Histopathologist, SIUT, Civil Hospital, Associate Professor, Department of Histopthology, Karachi SIUT, Karachi Kamran Mahmood Ahmed Musarrat-ul-Hasnain Incharge Diabetic Centre, Aseer Central Hospital, Saudi Director & Head, Department of Medical Education, Arabia Punjab Medical College, Faisalabad Khalid Ahmed Naheed Sultan Professor, Armed Forces Institute of Rehabilitation, Professor & Dean of Surgery, Dow University of Health Rawalpindi Sciences, Civil Hospital, Karachi Journal of the Dow University of Health Sciences Karachi 2012, Vol. 6 (1): iii-iv iii Acknowledgement to reviewers Nasir Khokhar Shahab Abid Professor and Chairman, Department of Medicine, Associate Professor, Program Director Gastroenterology Shifa International Hospital, Shifa College of Medicine, Residency, Aga Khan University, Karachi Islamabad Shujaat Hasan Idris Nasreen Majid Head Department of Community Dentistry, Lahore Consultant Obs. & Gynae, Memon Medical Institute, Medical & Dental College, Lahore Karachi Syed Akhtar Hussain Bukhari Qazi Abdul Muhammad Assistant Professor, Community Dentistry, Lahore Professor of Rehabilitation, House No. 289, Street No. 4, PAF Housing Society, Opposite Baloch Colony, Tahir Ali Khan Karachi Professor, Department of Science Dental Materials, Sardar Begum Dental College, Gandhara University, Rabia Arshad Usmani Canal Road, Academy Town, Peshawar Department of Public Health Practice, Institute of Public Health, Lahore Talat Ahmed Professor & Head of Pharmacology Section, Rana Muhammad Khan Shifa College of Medicine, Islamabad Department of Operative Dentistry, Islamic International Dental College & Hospital, Islamabad Umair Dastgir Bhatti Head Department of Peiodontology & Oral Robina Ali Maxillofacial Radiology, faculty of Dentistry, Associate Professor, Department of Obstetrics & University of Lahore Gynaecology, Punjab Medical College Faisalabad. Waris Qidwai Rubeena Gul Professor and Chairman, Department of Family Department of Community Medicine, Khyber Medical Medicine, Aga Khan University, Karachi College, Peshawar Wasay Wasay Sadia Iqbal Associate Professor, Department of Medicine, Assistant Professor, Department of Oral Pathology, Aga Khan University, Karachi Lahore Medical & Dental College, Lahore Zahid Shah SairaÊWaqar Consultant Surgeon, House No. 74, Street No. 10, Department of Paediatrics, NICVD, Karachi Sector J-1, Phase 2, Hayatabad, Peshawar Sarah Saleem Zehra Naz Associate Professor, Head of Population and Department of Biochemistry, Islamic International Reproductive, Health Program, AKU, Karachi Medical College, Rawalpindi iv Journal of the Dow University of Health Sciences Karachi 2012, Vol. 6 (1): iii-iv.