for researching epidemiology and groups of chronically exposed populations, however any attempt to provide a diagnosis based on hair for an individual is not possible. an exception to this can be in advanced analyses for acute poisoning. literature pragst f., balikova m.a.: state of the art in hair analysis for detection of drugs and alcohol abuse; clinica chimic acta 370 2006 17–49. auwärter v.: fettsäureethylester als marker exzessiven alkoholkonsums – analytische bestimmung im haar und in hautoberflächenlipiden mittels headspace-festphasenmikroextraktion und gaschromatographie-massenspektrometrie. dissertation humboldt-universität berlin 2006. pragst f.; auwärter v.; kiessling b.; dyes c. (2004). "wipe-test and patch-test for alcohol misuse based on the concentration ratio of fatty acid ethyl esters and squalen cfaee/csq in skin surface lipids". forensic sci int. 143 (2–3): 77–86. doi:10.1016/j.forsciint.2004.02.041. pmid 15240027.