“…For example, the time of alcohol ingestion, phase of drunkenness, fatigue and hangover, drinking habits, age, social status, concomi tant ingestion of drugs, concomitant presence of some disease, nutritional status and indivi dual factors have proved to be important additional factors and have been shown to increase the number of erroneous test per formances of alcohol-intoxicated subjects (Bschor, 1951;Alha, 1956;Kurzinger, I960;1966;Griiner et al, 1961;Krauland et al-> 1963;Ducho, 1967;Steigleder, 1968;Milner, 1972;Penttila et al, 1974.…”