Frank's wife Mary just posted this health update on Frank's Facebook page:
Frank is checked in at St. Joe's Hospital; after further test he is scheduled to undergo an operation to repair two clogged sections of the main coronary artery.
Dr J Miller will perform the operation around 9 in the morning. The recuperation period is expected to be 5 days to one week with another 4-6 weeks to more fully recover through restricted activity. He is remarkably resigned to having operation, grateful for such wonderful help & the love of so many friends.
We will be in touch with you with updates after the operation, period of time in ICU and when we he is transferred to his hospital room(do not know the # yet).
For those who do not know, Frank is a folksinger and guitarist, a founder of the Old Town School of Folk music in Chicago, and was a member of the Weavers for a time.