Assertion: fistula's opening | /r/HasProperty | difficult to identify
Facets:
Source sentences:
text: However, such studies can be helpful when the primary opening is difficult to identify or when recurrent or persistent disease is present.
text: However, such studies can be helpful when the primary opening is difficult to identify or when recurrent or persistent disease is present.
text: However, such studies can be helpful when the primary opening is difficult to identify or when recurrent or persistent disease is present.