tedtink
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I think the lack of coat assumed greater significance because of Richard’s Sickle Cell Disease. My understanding is that cold can cause significant pain and potentially a Sickle Cell crisis. JMO, I’m not an expert.
Yes it can, but not in all people with SC.
Exercise can also cause a crisis, but we know RO played basketball.
We don't really know his limitations or what may have triggered a crisis for him.