Tony, I had the nasal O2 hooked up to me at the time, and had to use Albuterol inhaler in order to sing. Unfortunately, the drug is short lived, but I usually get an hour or so of relief.
Donny, thanks for listening and commenting, old friend. Today, I'm headed to the boat to do some last minute work before putting the sails up and sailing to Saint Somewhere.
All the best,
Gary

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K+E=W (Knowledge Plus Experience = Wisdom.)