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Lozano, R (Dec 15, 2012). "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.". Lancet380 (9859): 2095–128. doi:10.1016/S0140-6736(12)61728-0. PMID 23245604.
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Cornford, E M; Bocash,W D; Braun, L D; Crane, P D; Oldendorf,W H; MacInnis,A J: Rapid distribution of tryptophol (3-indole ethanol) to the brain and other tissues. Journal of Clinical Investigation, 1979, 63. vsk, nro 6, s. 1241–8. PubMed:447842. doi:10.1172/JCI109419.