Authors: Muhammad Umair Mushtaq; Muhammad Ashraf Majrooh; Mohsin Zia Sana Ullah; Javed Akram; Arif Mahmood Siddiqui; Mushtaq Ahmad Shad; Muhammad Waqas; Hussain Muhammad Abdullah; Waqar Ahmad; Ubeera Shahid; Usman Khurshid Journal: BMC Public Health Date: 2010-02-09 Impact factor: 3.295