I finally (reluctantly) answered this call. It was from a breast cancer research organization, to which I had made a contribution in 2012. The caller was very polite and was just soliciting another donation for this year. Useful tidbit for others who may receive this call: I told him that I had changed my approach on donations to breast cancer research and instead of donating directly to the organization, I was contributing toward friends' personal campaign efforts. (It's true!) He thanked me and the call ended in under two minutes.