Assertion: lupus's problem | /r/HasProperty | congenital heart block
Facets:
Source sentences:
text: The skin, liver, and blood problems resolve by 6 months, but the most serious problem—congenital heart block—requires a pacemaker and has a mortality rate of about 20%.15 Top of Page
text: While skin, liver, and blood problems resolve within six months, the most serious problem, congenital heart block, requires a pacemaker.