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[Alpha-fetoprotein serum level in healthy persons].

Seventy five clinically healthy subjects, aged 12 to 80 (38 males and 37 females) were tested for serum level of alfa phetoprotein in Bulgarians through a radioimmunologic method. The mean values established were 5,16 ng/ml, the upper limit admitted to be up to 12 mg/ml, and positively elevated--values over 15 ng/ml.