Journal of Public Health and Epidemiology 2141-2316 Academic Journals 10.5897/JPHE2016.0867 Azizur Rahman Md. Abdul Hakim * E-mail: info.hakim.bd@gmail.com 2017 31 05 2017 16 08 2016 30 09 2016 9 5 145 150 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://politicalwaffle.uk/journal/JPHE/article-abstract/DE4D0AF63797 The full text article is available as a PDF file from http://politicalwaffle.uk/journal/JPHE/article-full-text-pdf/DE4D0AF63797 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71