South Texas Blood Center?...calling at 5 pm on a Sunday!! Talked to them a couple days ago when they called....not interested, I'm diabetic and don't know what all else I may have been exposed to in foreign duty... don't call. So they called today at 5 pm....normal business hours?....Can't take no when it's explained?  Donating blood is voluntary, and should not be solicited over the phone by an organization that does not remove numbers when asked and explained why the individual is not donating. This is called harassment!