[Evaluation on risks connected with the supply of bovine somatotropin to lactation cows]

animal health chemical composition composition chimique composizione chimica cow milk dairy cows dairy hygiene higiene de la leche hormonas pituitarias hormone hypophysaire igiene lattiero-casearia lactation lait de vache lattazione latte di vacca leche de vaca pituitary hormones residues residui residuos salute degli animali sanidad animal vacas lecheras vacche lattifere