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ncbi.nlm.nih.gov
Kennedy, PG. "Clinical features, diagnosis, and treatment of human African trypanosomiasis (sleeping sickness)". Lancet neurology. 12 (2). Feb 2013: 186–94. doi:10.1016/S1474-4422(12)70296-X. PMID23260189.
Lozano, R. "Global and regional mortality from 235 causes of death for 20 age groups in 1990 and 2010: a systematic analysis for the Global Burden of Disease Study 2010". Lancet. 380 (9859). Dec 15, 2012: 2095–128. doi:10.1016/S0140-6736(12)61728-0. PMID23245604.