Conversation so far:
Where did Gregg Allman tour?
The group returned to touring, and played arenas and stadiums almost solely.
Who did the Allman Brothers Band tour with?
The band enlisted Lamar Williams on bass and Chuck Leavell on piano.
Did the Allman Brothers Band record any albums?
Allman began recording a solo album, which he titled Laid Back.

Question: What kind of health problems did he have?
Self-contained rewrite: What kind of health problems did Gregg Allman have?