Have received several calls from different phone numbers in DC with ALA caller ID (American Lung Association). They call every few days. IF they really are a charity, why have so many numbers that aren't even sequential? Smells like a scam.
Got another call this morning (Saturday) @ 9:53 am - they left no message. In the last 3 days, among many others, I've received a couple of dozen calls with the caller listed as Washington DC.