PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ); certain phosphodiesterase inhibitors (PDE-5 inhibitors) used for erectile dysfunction such as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra); rifabutin (Mycobutin); salmeterol (in Advair, Serevent); and tadalafil (Adcirca).
http://www.w3.org/ns/prov#wasQuotedFrom
  • nih.gov