The Lancet
Sep 12, 2015 Volume 386 Number 9998 p1013-1108
http://www.thelancet.com/journals/lancet/issue/current

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Comment
Diaspora engagement in humanitarian emergencies and beyond
Neeraja Nagarajan, Blair Smart, Joseph Nwadiuko
DOI: http://dx.doi.org/10.1016/S0140-6736(15)00071-9
Summary
Migration of health workers from low-income and middle-income countries (LMICs) to high-income countries continues unabated, with substantial effects on the development of health systems in LMICs.1–3 WHO estimates that an additional 4·3 million health-care workers are needed to meet global health-care needs, with acute shortages in LMICs.4 Yet almost 25% of physicians in high-income countries such as the USA, UK, Australia, and Canada are foreign-born and from the very LMICs that face shortages in health-care workforces.