1. Organization WH. WHO medical device technical series. Medical equipment manteinance programme overview. 2011.
2. ABO blood groups distribution and cardiovascular major risk factors in healthy population;Abdollahi AA;Iran J Public Health,2009
3. Association of ABO Blood Groups and major Ischaemic Heart Disease Risk Factors;Lutfullah BA;Ann King Edward Med Univ Lahore Pakistan,2010
4. World Health Organization. European Health Report 2018: More than numbers — evidence evidence for all [Internet]. Who. 2018. 147 p. Available from: https://apps.who.int/iris/bitstream/handle/10665/279904/9789289053433-eng.pdf
5. Rechel EB. Kazakhstan Health system review. 2007;9(7). Available from: https://www.euro.who.int/__data/assets/pdf_file/0007/85498/E90977.pdf