[Letter to the editor].
D000681:Amylases / Q000032:analysis; D000818:Animals; D003300:Copper / Q000032:analysis*; D008460:Meat / Q000032:analysis*; D008892:Milk / Q000032:analysis*; D011635:Public Health Administration; D012426:Russia
D003300:Copper; D000681:Amylases
Pis'mo v redaktsiiu.