**2. Methods**

#### **2.1 Literature search strategy**

The author has used a method that describes the process of developing a systematic search strategy. Databases were searched to identify relevant articles, policies, and guidelines using a Boolean combination of key terms around the management of blood supply and blood demand and its relations to international health security. To ensure inclusivity, the only search limits were English language and peer-reviewed publications or policies and guidelines approved by the international society up to mid-July 2000. Reference lists of identified articles and published reviews were also examined. A total of 1277 articles were identified (after duplicates were removed) and exported to an Endnote library for eligibility screening. The search terms used for extracting management of blood supply, blood demand, blood shortage, blood transfusion services, national health security, and international health security with Boolean combination of key words for abstract as (blood supply OR blood demand) AND (blood OR blood components) and for full text as (blood supply OR blood demand) AND (blood OR blood components) AND (international OR global OR worldwide OR universal.) AND (Health security OR health guarantee). The databases for search included ProQuest (ProQuest Central, Public Health Database, Social Science Database, ABI/INFORM, ProQuest Dissertations, and Theses Global), EBSCOhost (Academic Source Elite, Business Source Elite, PsycINFO, CINAHL, MEDLINE), and Wiley Online Library (specifying "blood supply and blood demand" in publication title).
