Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/2841004
Is Reference of Purified protein derivative(tuberculin)-en#Sense
PPD-en#Sense
PPD-fr#Sense
Proteina purificata derivata della tubercolina-it#Sense
Dérivé protéique purifié-fr#Sense