Assertion: petrolatum | /r/ObjectUse | used as negative control
Facets:
value: for patch testing by many dermatologists
type: PURPOSE
Source sentences:
text: In fact, petrolatum is used as the negative control for patch testing by many dermatologists and can be found as a carrier for many of the ingredients on the dermatologist’s standard patch test tray.
text: Petrolatum is used as the negative control for patch testing by many dermatologists.